I got these as soon as they came out because free float is a big issue for me. I also really, *really* like the metal on metal contact and that fact that the shoe tread is not part of the connection. I really notice and appreciate the consistency in the connection and that locked in feeling.
I have not had any problems at all with it inadvertent unclipping. I have, however, adjusted the float so that my foot cannot hit the cranks (don't know if that helps or not). But in serious pulling up on the pedal, no issues whatsoever.
I have not had issues with mud or snow. The only place I did have a problem was when I moved these cleats to my fatbike this fall and did a lot of beach riding on the beach by my house. Here, the sand is this sort of very square crystal and in the many years we've lived here, it's screwed up everything (really badly too). After about three weeks of riding some sand got jammed between the cleat and the sole of the shoe which took out the float motion. Once I got the sand out, no problems. So I don't blame this on the pedal because it's sort of a special situation and I had done no maintenance on the pedal or lube.
For gravel riding or road riding with these pedals, there is nothing better and the connection approaches that of a road pedal. MTB riding is fine as well.
My prior pedal for years was Time ATAC. The Syzrs are better. Only advantage to the ATAC is in the sand (see above). However, the cleat can slide sideways on the springs and with Lake MX303 winter shoes/boots, that allows the side of the shoe to rub on the crank. So while it helps in the sand, it sucks on the pedals.
My Syzrs came from the factory with the release tension set loosely. I tightened that up and as noted in other reviews, the entry and exit was better and easier to tell when you were getting close to engaging or disengaging the pedal.
Bottom Line: I'd recommend them. I like them a lot.