Michael is right,
There are some excellent user-generated demos on the site, but I wish there were some more "official" ones.
I'm not in the business so I don't know if I'm asking for the impossible, but I think it would be of enormous benefit to have demos of each individual instrument, demonstrating at least a variety of (if not all) the articulations.
At the risk of sounding like a jerk, I think the East West Quantum Leap site has a much better "demo" fancility than this site (albiet without user-generated material, which is a shame). It's a wasted oppertunity