Erik C.wrote a review of Backcountry Access Alpine Trekker Adapters on February 11, 2013
Familiarity: I've used it several times
I bought these to use for a 3 day backcountry class and I wasn't sure that I wanted to invest heavily in new gear for (potentially) a single trip. Reading through the other reviews, I can just as easily apply the positives and negatives to my experience. Set up was easy and pretty intuitive. Traveling on flats or directly up the fall line was easy enough, but traversing and side stepping were very difficult. There was too much play between the boot-trekker-binding to set a really solid edge with them on.
They pack up nice and small. They're not as light as a rando set up, but skis, bindings, trekkers were lighter than a friend's designated backcountry set up.
My biggest problem wasn't with the trekkers directly, but with the stiffness of my boots and the inability to really flex forward onto my toes for a more natural gate.