I've got the full clip-in version (new-matic). Just took these to Mt. Shasta to do Casaval Ridge. They are solid...no doubt ever that they'd stay on and remain firmly connected. There was no issue with snow collecting under them later in the day. The teeth are nice and secure. There's incredible detail in the design. They work well with my new La Sportiva Baruntse boots. The last pair of crampons I've been using are Black Diamond Contact Strap ten point crampons. Those were nice too, and you really can't compare them. I'm a huge Black Diamond fan. But I'll just say I like the Grivels more when it comes to mountaineering crampons. That being said, I haven't tried out the twelve point clip-in Black Diamond crampons. But I do like Grivel's detailed design. Their kind of designs remind me of the detailed designs produced by LibTech for snowboards (if you happen to be a snowboarder). There's just a lot of attention to detail. If I were looking for some solid mountaineering crampons that'd work great for technical climbing (but not full on waterfall ice), I'd grab a pair of these.