I personally don't notice any difference in the sound, but then I'm the sort of person who laughs when someone boasts that they are recording at 96kHz, when the track is hardly worth recording at all!!
However, I can say that GS3 has greatly increased my workflow, as programming for me is much quicker due to the added number of dimensions available.
GigaPulse can really transform some sample collections. It's one of the best sounding convolvers on the market, with a very unique set of capabilities. So, if you're rolling GigaPulse into the equation, then yes, GigaStudio 3.0 can make your libraries sound remarkably better in some cases.I concur with Bill on paying too much attention to problem reports. The vast majority of users don't have problems. Those who do are understandably frustrated. There are a lot of very high profile, busy, people who depend upon GigaStudio daily...so it's not some sketchy thing at all.