I really don't understand when people say they don't like the VSL strings (or other instruments) .. what's not to like about them. They have the most controllable, and realistic playback you're ever likely to get in a sample library. Over the last several years there's one immutable thing I've learned.
My Virtual instruments performance is only as good as how I write it to be.
Okay .. in some cases that means you've got a lot of hard work if you want something to sound good .. but when've you've learned how to use your tools properly that's hardly a big deal. Personally I LOVE the sound of the VSL. The strings are expressive, realistic and extremely controllable. Between Velocity xfading and cell x-fading you can achieve almost anything.
I've heard demos with Hollywood strings and with LASS and frankly I've been unimpressed by the realism when compared with VSL. Of course I will concede that it may simply have been the composers fault for not doing a better job with the LASS and HS. I've heard just as many bad renderings with VSL .. Hell I've recorded plenty myself :P ... But my point is that any tool take time to learn to use properly.
Take reverb for instance. Man I have spent so many frickin' man hours trying to master this beast. And only nowadays ..after years of experiments .. do I feel like I start to get somewhere with it.
Here's a good analogy. Take the CGI program 'Poser'. It lets you simulate people in 3D .. gets used a lot for fantasy .. (and porn :P), and anyone can buy it. I've seen lots of poser generated pics that look exactly like a CGI character .. absolutely nothing like a true photo real flesh and blood person. But now and again I see a Poser image that is exceptional. And I can usually tell which artist did them because you know these few people have spent years learning how to texture, light, and shade their creations. They know the things to avoid, they know what doesn't look real and what does .. because of experience.
And it's the same with a decent mock-up in virtual orchestra. So many people want a complete out-of-the-box, press the button and everything is perfect straight away, kind of experience. I'm not saying that working with a sample library should be hard ... but I personally like the fact that if I have a recording that sounds really good .. it's because it reflects years of learning and understanding that went into producing it in the first place, and the library was versatile enough to let me do whatever I wanted.
With such a versatile library like VSL it amazes me that there can be negative reactions to it .. you can do anything with it .. if you know how!