I've heard problems with all of them. I have the NAXO NX21s and like them a lot. You have to figure out the right DIN though because I popped out a lot at the suggested DIN for my weight/ability. I had to crank them up a bit but I haven't had any problems with them since. I suggest just putting them at 1 DIN level higher than suggested. I still pop out when needed but dont' pop out randomly when simply catching an edge like I did before adjusting them. Some people complain about some of the parts being plastic and breaking them but you have to either weigh a ton or be stompin HUGE drops to do that. I've heard the same problem with the Fritschi's except that rather than breaking, they pop into touring mode which is really sketchy. Again, you have to weight a lot or be hitting huge drops for that.
I can't really review the other ones since I haven't ridden them but ss far as my NAXO NX21s go, they have an amazing warrentee policy albeit I think the company might have recently gone under but I think Rossi was trying to buy them out or something. They just replace them for you if you break them, you just have to wait for them to arrive in teh mail. Switching to touring mode is really easy, you dont' even have to take off your gloves (unless you're wearing mittens). Ascending is really fluid, almost feels like walking, which I've heard is one of the stronger points of the NAXOs. Descending took a little getting used to but so does any AT binding. Once I got used to them, I can ski them just like they had Alpine Bindings on them. In fact, it feels wierd getting back on my Karmas which have alpine bindings now.
What skis are you thinking of throwing them on?
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