I went with a 10" Xtrons unit and am fairly happy. Has it's issues but all in all it was worth it.

The big screen is nice for my aging eyes, but it can be a bit of a stretch to reach the right side of the screen. Not recommended while driving.

Get a unit with the most RAM. Apps are bit slow to load under 2GB. Even at 2GB it takes mine a a minute or two to load and I don't use a bunch of apps. Basically only IBus which does not like to load on it's own.

I ordered IBus from the manufacturer. It's great but a bit buggy.

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2004 X5 4.4 Build 01/04 Alpine White on Schwarz Dakota Leather, Anthracite Headliner
Xtrons Android HU, SPORT PKG, COLD WEATHER PKG(W/REAR HEATED SEATS AND HEATED STEERING WHEEL), CONVENIENCE PKG, FACTORY HITCH