I've had a U310BT for a couple years now and have no complaints running on firmware version 1.003(I believe). The only thing I wish to add is Pandora radio. Certainly, I can connect my phone via the mini-jack port but I would to link it via Bluetooth. I've been reading a bit and it seems many have got custom apps on their head units to do various things but I haven't read anything about Pandora. Has anyone linked Pandora through Bluetooth or know if it's even possible with is unit? I think A2DP through Bluetooth is the feature I'm trying to add.