They're rubbish. I don't think I would ever buy anything from them based on their customer service.
Bought the software for my phone a few years ago and had some problems installing it, they were no use whatsoever. Turned out to be a bug in the "Home" software, fixed by a downgrade.
Bought a TomTom Go for the missus last year thinking they must be better by now. It's a pain in the arse – sometimes it doesn't turn on, locks up, etc. I've been that close to throwing out the window several times but don't want to call support as I know they'll be no use.
Will vote with my feet and buy the missus a road atlas next time 🙂