the twenty6's are nice.
I like the canfield crampons, I also run some VP pedals that have a nice thin body and a million studs to keep my feet in place.
I don't like the wellgo because they don't have as many studs, they are a wide/thick body, and they don't hold up to rocks as well as some others. That said, if you don't smack them on a lot of stuff, don't mind the additional width, and have some good shoes they work just fine. The price is right, but there are better pedals out there, you'll just pay more for them.