OK, I had installed mine a couple weeks ago, but it has been too cold to test out except for a few inches.
Today I carefully (it was about 48 degrees) did a few full cycles of the top and the Bahntech unit works great! It is so neat just to be able to do the "chop" in real-time, and also to have the unique experience of stepping back from the car and getting to watch the action. It will be even more fun, in, say 5 months...