1. Popping sounds - I got rid of my bose amp as it has floating ground and not common ground which makes it incompatible with all the aftermarket head units out there. You use a Bose adapter which gets rid of all the startup pops and bangs but reduces sound quality, lots and lots of D2 live with this compromise.
2. Backup camera is working perfectly and is mounted centrally in the number plate tray, very OEM and stealthy look.
3.When using carplay/android auto everything is done through the phone so you don't need the GPS antenna mounted in the car.
4. I am 100% happy with it. The current up to date version that they sell has more memory and CPU cores, built in carplay/auto and also displays to FIS (the screen on the cluster) icebox auto has great support over email and phone and can sell spares like screens or front panels if you break them
I wil probably be upgrading to the latest version for Xmas.