check out www.e46fanatics.com for dynavin reviews. They are specific to BMW E46 model, but should be applicable. Also see www.szenco.com for dynavin clone w/much better price. I've been considering it lately. I yanked out my computer/touch screen a couple months ago. Got tired of it working intermittantly, don't have time to dink around with it anymore. That would be my only concern with dynavin or clone -- for me it has to work consistently with limited tinkering.