The drivers seemed to understand the signalling. But with a winter glove, on a decent and making a left turn, you must look down and carefully move the switch to the left. That part's takes a little learning..but to cancel when you come out of the turn it's too easy to push the switch all of the way to the right (falsely indicating that you'll be now turning right).

But maybe for other people who are just traveling on the flats this would be OK?