The Avin is certainly a good unit. But they are the same thing as the "cheap" Android units if you get the right versions. Meaning get one with an 8 core CPU, 4GB RAM, and at least 32GB internal storage. My no name brand unit even came with an AVIN folder and files in it.

For convenience, most definitely order from Avin. I've done so a few times and Tommy was always helpful, including RMA'ing an Avin 2 for warranty wi fi issues. I wouldn't expect any kind of help from the Ebay company I bought my $350 unit from.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)