I take my words back. Kind of.
Here're my thoughts after using CSS exclusively for the past 2 years or so.
Just my opinion, mind you.
After a year(s) of messing around with Cinematic Studio Series, connecting my old SSD with SSO.... Wow. Felt like a fresh air. The timbre of AIR.... No amount of processing will ever give it to you. And with CSS, the more you try to EQ it, the worse it sounds. "Cleaning up" essentially kills the whole sound of it, making it even more "sterile" and weak, especially in the violas/celli/basses.
There are nasty build-ups that, however, contain crucial low end power (and character overall), so it's better to accept 95% of the sound you get out-of-the-box with CSS. I mean, on its own, the sound is beautiful. Just not "sleek".
CSB is a bit disappointing as well. Horns are great, but trombones are just not cutting it, sound-wise. It's not the smaller sections. It's the sound. If you're writing your parts the proper way, they don't sound as a section at all. JW/BH often used this standard section size, but it sounds nothing like if you write a three part chord with B.Tb./Tb./Tb. with CSB. Tuba is weak. Everything just like the strings sound like they're coming from the radio speakers and brass lacks the body/power/low-end. Trombones, again, quickly go to cuivre yet sound annoying and metallic and not at all warm and powerful. Trumpets are kind of okay-ish, maybe.
The biggest shock is that after 2+ years, having learned all the delay values, all the first legato note values for nudging etc... I can still say: I have never wasted so much time tweaking and adjusting instead of composing as with Cinematic Studio Series.
Still, it has a place to be. Despite its rather compressed dynamic range, all the aforementioned fluff and it, on rare occasions, sounding synthy, CSS is still the most realistic sounding strings library for exposed/sparse arrangement writing. I still love it.
SSO is returning to become my main tool, again. Despite the inconsistencies and wonky legato and stuff, it's SOOOOOOOO much easier and faster to work with, it's mind blowing. It just sounds "alive". I'm still not a fan of SCS, though. That sound is pretty bad to my ears. The real ensemble this size, would absolutely work. But hearing it exposed with its tiny violin section just screams samples to me, just like it did back when it came out (unless, you're using a lot of shorts/FX/trills).
What I will be doing is going back to layering, again. That way spitfire scripting is easily masked and you're left with a modern, smooth sound you're still hearing in all these big budget scores. The sound that I love (again, not telling you it's the only "correct" sound for you).
P.S.: Mixing is a breeze now. Layering adds another dimension to my sections. Legatos are buttery smooth. The dynamic range is HUGE. The hall and clarity of the recordings take my breath away, I'm once again excited to write music.
P.S.: Of course, you can make CSS sound great. It's just as soon as you directly compare it to AIR, it immediately starts to sound much more "low budget" or "old". It's perfect for making specific types of classical or writing in the style of 40s-90s. It's just no amount of programming or mixing will make it sound like your favourite AIR recordings (or other big halls they record classical/scores nowadays). And it's the truth. It's just not possible to get this lush sound with deep, enjoyable lows, clear mids (that you can clean up a bit to make it sound even more "current" like Zimmer/Wallfisch/you name it) and silky highs. And when you mix it, polish it with smart processing, you can make it sound almost like a real orchestra and like you had your mockup mixed by a Grammy winning engineer. Not to mention SSO is much more friendly to huge mixes with a lot of elements in it like massive sounding synths, choirs, percussion and etc. when you need it.
After 2+ years of not using Spitfire I'm here to say: I was wrong.
Well, partially, at least.
SSO is not perfect. But my own workarounds allow me to get rid of its missteps, bugs and scripting. Go as big or small as I want, or as loud or quiet. And to have all the benefits of the marvellous recordings and hall. The mixing is a breeze and it just sound much more "professional" (read: open; modern; enjoyable for listening). And it's not because of my programming skills. It's that overall sound. You can't change it. To make CSS sound remotely like that you need much more processing. And you still won't be able to reach that because with removing frequency build-ups you're also removing the power and fullness, especially in basses and celli. To be honest, CSS sounds the best when you just accept it sound and barely use any EQ or other plugins. It can sound very good. But reaching that typical "mastered" sleek sound you hear on hollywood scores nowadays will be borderline impossible. If you're after John Williams, Bernard Herrmann, 40s-90s(-ish) sound then look no further. Cinematic Studio will sound just like that straight out of the box.
That doesn't mean I'm a Spitfire fan out of a sudden. I fon't really care about the Albions I have. I never cared about Abbey Road and BBC SO while really capturing the orchestra's sound from what I heard in the demos is associating with strictly classical/concert music to me. And I'm not writing symphonies here. And their synths/guitars also never appealed to me.
I know many hate SSO. Many say it's "too big", etc. But to me, having an ideal sound in my head, with tricks, layering and smoke and mirrors, at least sith SSO I know it's achievable. While with Cinematic Studio it's a bit out of my hands. Small subtle textural things sound great with SSO. Medium things as well. Big action cues. Huge epic stuff. Sweeping romantic stuff. Song arrangements. Everything works while after 2 years I can't say the same for CSS/CSB/CSW. Its uses are rather limited
.
Song arrangements were the weakest, in particular. I sometimes work with a few Grammy winning engineers/producers for their clients. When I send them stems, I mix them. They barely touched SSO ones. Cinematic Studios, however, is bit awkward to implement. It doesn't have "weight" or "lushness" to it. EQ, saturation or stereo wideners or what not. Doesn't sound bad. Sometimes, pretty good. Again, none of CSSeries is BAD. Not at all. But just never that "alive" or "professional" in a high budget production. This is not an attack on it. It's not that extreme or bad as you may think reading this. All I'm saying is the hall and the quality of samples matter.
I did learn a shit ton about mixing thanks to it. That's the biggest plus. But I'm not sure even Grammy winning engineers have managed to make it sound all that good in a mix. And that's with a band and vocals on them. The orchestra wasn't even a main focus. (And that's on a dozen of projects). While my wonky programming from years and years ago with early SSO still sounds amazing. There's just that magic and extra "oomph" thanks to the quality of samples + hall.