Looking at this myself - check out ebuyer, they have 134 reviews/comments, so you should get some idea from there. Interestingly, in theory, you can change the software to TOMTOM if you want to (not that you should etc etc)
True, but then you'd be paying 45 + TOMTOM software, which means you'd probably just be able to get a TOMTOM out the box (btw, this is all academic).