I'm not so big on the loops in GB cuz I write all custom stuff, but I'd love to see the built-in instrument library grow. If they could get a huge instrument library (even for sale as extra modules) that would be stellar. The existing small library sounds wonderful overall, though I can easily choke my meager iBook with only a few instruments. My main synth is an E-MU E-Synth workstation, with a monster library of top notch sounds (as anyone familiar with EMU will confirm). I also use CuBase as my main sequencer, but I have to say I absolutely love GB's super simple approach. It reminds me of the old days using Mater Trax, a very simple, but useable sequencer from the late 80's early 90's. I love the idea of having my whole sound system reside in the Mac as opposed having the E-Synth, which can't really talk to the Mac other than via MIDI. I'd love to be able to save song data, FX data, sound data and final mixes right inside the Mac. Yes, I could do that with CuBase, but only after dropping thousands of dollars on instruments would that be possible. Also, GB doesn't seem to want to cooperate with my US-428 which defaults to 48KHZ. Switching the 428 to 44.1 doesn't help and I can find no way to output GB as 48 KHZ monitoring. This means I can't currently use my E-Synth sounds and GB at the same time in an all digital format.
In short, GB is very cool, very fun, very easy to use and sounds superb.
In short, GB is very cool, very fun, very easy to use and sounds superb.