Avin Avant 4 Headunit users?

[01M3Fan]

I've got one of these, bought pretty much all the upgrades for the head unit itself - did not opt for the backup camera. When the unit works, it is great - mine is very glitchy and will occasionally loose it's mind. Almost zero customer support - you end up emailing questions and then you get occasional responses with links to things that should be readily available for a user. I am on the fence is I am going to buy another for my other E46 - might try a different brand.