Grif I'm glad you've had better experiences with PreSonus. My post wasn't meant to be a universal declaration of their suckiness- rather, a personal conclusion based on my experience with at least 3 different PreSonus products that were designed to interface with computers and did not do so well.
At church we have a couple of Presonus units hooked up to a Mac for recording. They refuse to run at anything other than their native 96k sample rate, even thought they say 44.1, 48, 88.2, etc are supported. Half the time they don't sync properly and are not seen by Pro Tools (10.) We then have to power them off and back on again.
One of my friends just went through upgrading his system. He was using a PreSonus (Firetube?) unit at the time, which had worked fine on his 32-bit Win XP system but wouldn't work with 64-bit Windows 7. This was only a couple of months ago, so it's not like either Windows 7 or 64-bit were brand new.
Then the FaderPort for me, which was always iffy to configure, caused issues with projects loading in Sonar, and required a registry hack to work in 64-bit. The fact that the Alpha Track also had this issue doesn't make me feel any better. These are tech companies creating products to work with computers, and 64-bit versions of Windows have been around for a LONG time. If they can't engineer something to work with both 32 and 64 bit by now, that's really sad.
Since PreSonus uses the same drivers for all of their recording interfaces (Universal Control, I think?), this gave me the takeaway that their drivers are buggy with Macs in general and with anything 64-bit. To me that is unacceptable, which is why I personally won't buy any new product from them that needs to connect to a computer.
This isn't meant to be a hit piece on PreSonus itself. I have some of their other products (DigiMax FS, original BlueTube, etc) and they are solid pieces of gear. Then again, they don't need drivers.
Peace,
Tunes