Very handy, haven't done much on the X5 except for an oil change, but I've done just about everything on other cars, including fluid changes and brake / clutch bleeding. CDV delete is something I've always planned to do anyway, but haven't had the opportunity to. Next month I am finally getting into a place with a nice garage...I'm not sure if the brake fluid is due to be changed, as it had new pads put on right before I bought it and it could have been done, but I'm doing it anyway, along with tranny and diff fluids. Better safe than sorry!