Got it out of the box and did a full backup like many others have suggested. That took more than an hour. Then downloaded a new map. After an hour, TomTom Home reports an error. Tried again. Another hour later, another error.
Tried to delete the map. Map not found, but something's still occupying more than 1Gb on the device. Checked online. Found a helpful post that says delete everything on the device and do an update. Did that. 30 mins later, got the new application installed. Tried map update. This time it seems to work. Left it running and went to bed.
Next morning, found that PC has gone into sleep mode. Woke PC up. Map updates 80% complete. Home continued where it left off. Another hour later, tried the device. Says "Map not found". Looks like the PC going to sleep messed it up.
Two days later. Still can't use the blasted thing. I'm returning this POS if I can't get it working by today.
TomTom, if you're listening, you have *got* to upgrade the USB on this device.
Update:
Ok, finally got everything setup and running. Here's what I learned.
1. Turn suspend off on the PC when downloading new maps. It'll take a while and if your computer goes to sleep in the meantime, you start fresh.
2. Memory is limited on this device. So do a full backup first, then free up everything you don't need. The best way to do this is delete *all* files on the device. Yes, all. To do this, access the device like you would a USB drive, then reformat.
3. Then install TomTom Home on your computer from their website. Then do a software update, then maps, then voice. This gives you the smallest possible footprint on your device. There are some things you just don't need, like the install program for the PC *and* MAC, both of which are found on the device out of the box.
4. Don't pull your hair out if the device says there's no compatible voice even after you've loaded one. Do a full reset. To do this with the latest application (at the time of writing), start with the device off. Then press and hold the power button. The device will powerup with a drumbeat sound effect, then go to a diagnostic screen. Hold down the power button all this time. After the diag screen, the device will power down, then reboot. Now release the power button. Then setup device as before.
Overall, its a good device with lots of options once you get past the annoying setup phase. All the settable options means that its easy to get distracted on the road with this thing however, so plan accordingly and don't drive into a ditch.