Took about an hour to install, under OSX 10.8 on the running DP 4.5, with the latest drivers, it crashes every time I try to quit the Mac. Doesn't stop it from shutting down, but it's a pain - I could turbn of the console display, but it would still crash (it may be time for me to update to 10.3, not that 10.4 has been released, but I keep waiting for the Spectrasonics vs/ MOTU issues to get fixed...)
OTOH, it works great. Record, play back, change tracks, toggle record mode, solo, mute, etc. work flawlessly. The range is a bit weak, but greater than they spec by a fair amount - with the doors open, I can connect while recording my piano, which is about double the published range.
My only other minor complaint is it has been a bit of a bear to get it to connect and link up. I have to try several times, requesting from the transceiver (push the button) and the Tranzport unit (push Shift-Battery) at the same time to get them to see each other and link up with DP. But if that is a problem with many folks, Frontier will deal with it (I hope.)