OK, few different points here:
1) they are the best around and simple to use (after a while) because of the mounting, stabilization, and ease of getting accessories.
2) They don't go wrong very often so unlikely to need their customer service.
3) If you're buying direct to get the deal, expect a delay (sometimes)
4) Join the Facebook group or watch youtube tutorials to get the best out of them.
5) the 8 had issues with the GPS so sometimes you wont be able to put the overlays on (Speed, Maps, G's etc.)