Just wanted to throw my 2c here. Bought an Eonon GA9166a and had it installed. What I'm noticing is that the external microphone sucks (placed on the driver A pillar). Wife said it's low and has a low drone feedback. FM tuning got better after changing to America2 setting here in SCAL, but AM has a constant crackle that I don't remember with stock. Also I'm finding the volume is too loud for the current speakers. I'm on 5-6 on the volume knob and I'm finding it extremely loud early on. Lastly, couldn't find GPS card in the box so I'm waiting on Eonon to assist.

All that being said. I'm happy for now with the features. Being able to run a separate nav will be good in the future, but at least my bluetooth is fine by running the volume at about 70%