I wrote a first impressions review awhile back. I was skeptical, but bought them because a reliable source vouched for them. Now I have ridden them in AZ and Keystone, and I can say they are the worst bindings I have ever seen. Here are some fun things to look forward to if you b uy them:
-They do not tighten all they way, but instead the ratchet SKIPS OVER teeth on the strap at a certain amount of tension.
-They actually LOSE grip during the day, and need to be re-tightened (as much as they will allow)
-The highback lossens after ONE RUN, and wiggles around in its adjustable slots
The FIRST day I wore these out, one toe strap came OFF. Completely off. I was lucky that I noticed it and found the pieces, so that instead of riding with my friends, I could go find tools and repair it in the field. I will NEVER buy TechNine again. No matter how I adjusted the bindings to fit my boots, these were the biggest let down and waste of money ever. Tie your feet to your board with shoestring before ever buying TechNine MFM Pro Bindings.