Has anyone experienced problems with theirs, on my 2nd and still experience GPS connection problems and now it keeps rebooting itself :(

Had mine for a long while, never had any problems with it.

Oops..didn't read the Navigator bit...ignore me

What version SD card do you have in it? I have the 6000 which has v.2 and have never had problems but have heard about the original having problems with a particular version of SD card guessing version 1. It all depends on how long the dealer you bought it from had that stock to whether there is a chance it's got an old card in. Have you rang Road Angel direct as they should be able to tell you the current version and solve the issue, their support is pretty good I've used them once but it was a simple update query.