I haven't used them, but I did consider buying them before I found a bunch of good deals on my AT gear.
I'd watch the TRs leading up to your trip. If there's a boot track, I'd just carry the skis and boots up and ski down. (I find it easier to walk then to skin, even with the extra weight on my back.) Of course, if people are having to snowshoe in, you'd be in a bad situation if you couldn't skin up.