The Grossersaal IR is just amazing. Really adds huge amount of depth to the bass. All of a sudden it's like "Oh! .. That's where my double basses got to!". Really impressed with this. Straight out of the box .. or download wrapper anyways .. it's tremendously useful. No faffing around like with Altiverb (Sorry Altiverb but 3 years of trying to get a realistic nice sound has made me jaded).
Can't see how you can improve this product but I'm sure you will. Oooh .. actually .. you guys could make it PPC Mac compatible .. cos then I can run it on my G5 .. that's be awesome :P