Hi!
I don't know about the JamLab and i don't want to get you all discouraged, but there are problems with the Mobile Pre, too.
Here's my story (copy an pasted from another thread):
I'm using Garageband 3 on my new MacBook 2GHz 512MB (upgraded from 12" Powerbook with GB2) and I just came back from a little home recording session in Sweden.
Recording through a M-Audio MobilePre (yes, Intel Drivers) and mixing I had problems with playback distortion (solved by lowering GB output level) and playback cracks and skips. GB3 puts cracks and skipps into playback of just 4 tracks, 3 of them secured (little green lock). My Powerbook did fine on a lot of more! This urely can't be the end of capacity?! I plan on upgrading RAM, but it should be working fine with 512MB though! [end of quote]
Recording a MXL 99 condenser mic with phantompower produced clicks. It can't be bad electricity because I was on battery all the time (MobilePre works USB-bus powered), truely mobile so to say.
There were spikes in the waveforms of course.
In playback I had clicks, skipps and so on (without touching anything nor highlighting tracks etc.) with just 4 tracks.
I am a little upset, to be mild, and if the 14days were not yet over, the MacBook would be back right away (I should have waited for the Core 2 Duos anyway) but now i have to deal with it.
I am glad for any recommendation. The Mobile Pre never made any problems with the Powerbook under 10.3.9 and GB2, just for info.