Any particular reason why? Ive had tomtom's for a good few years now and never had a problem, and i know loads that say the same. obviously some will have had bad experiences no doubt, like the problems with the new style mounts and the switching itself off issue.

Id go for tomtom over any other device as its just so much easier to use in my opinon and has better features and a better layout than the rest.

I can do about 300-600 miles a day and have never had an issue apart form once, where a brand new road was being built, but it soon calculated me an alternative route instantly.