Tried the perpendicular park assist today while going to Sears to buy a garage door opener. My previous car had the built in home link and I don't know where the old remote might be. It would not work, kept telling me to back into a snow bank and drove right past open spots. Pulled out the manual (yes, last resort), and it said "if it didn't seem to work it may need calibration". To calibrate, it said to drive on winding roads. So I left Sears and drove on winding roads nearby. When I returned to Sears it wanted me to back into a white car, seems it has an affinity to white. I moved on, it then recognized the next open spot, yes really open this time, and did park itself well centered. It took at least twice as long as I would have taken; could have been me getting used to it. I didn't leave the car there though, I didn't want any door dings just yet. Parked out in no man's land. I think I would have liked the built in garage door opener instead. Oh, well, now I have both.