I did this event in Minneapolis a few weeks ago. Had a lot of fun. For a free event definitely worth doing.
I finished well off the podium time. Would have been higher, but I let the adrenaline get to me and held off braking too long at the end. Plowed right through 2 cones, and that 4 second hit put me so far behind.....
Also had fun with the open drive sessions. Hated the X2, which some mags are saying is a possible wagon successor to those of us who want a hatch. Loved the base Z4, and really liked the M850i. Probably only time I'll ever drive one, and it was sweet.