I have the B800. I have used it on E36s, 38, 39, 46, and now E53. Its a nice tool to have and easier to carry around than a laptop and accessories. If you have a local car club or even just a few local nuts, charge them 10 bucks to reset it and the tool will pay for itself. It comes with a good instruction manual and a codes table so you not only can reset it, but you can also see what set it off.

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2001 BMW X5 3.0 5spd Sport
-aFe Intake
-E46 Sport seat retrofit with Heat
2007 Mini Cooper S 6spd