RELIABILITY - I've owned 4 yamahas, no problems ever!
KEYBOARD RESPONSE & SOUND QUALITY - This clavinova is expressive. I sold my Korg SP250 recently. I thought the SP250 was good. When I hit the keys harder, it gets louder. But with CLP330, when I hit the keys in different velocity, it sounds totally different. I don't know how to explain, it just sound so damn realistic like a real acoustic, where as the SP250 sounds digital. CL330 is highly expressive. I rate the keys and sounds 9/10, and the speakers 7/10. I can't help but to think the CLP330 would be better with external amplification. As expected though, Yamaha pianos' sound bright, so it takes time to get used to.
ADDITIONAL FEATURES - basic features, nothing to brag about
CUSTOMER SUPPORT - no experience yet