David wrote a review of Speedplay SYZR SS Pedal on September 4, 2015
Familiarity: I've put it through the wringer
I've ridden SPD (xtr, ti xpedo), TIME ATAC extensively and tried eggbeaters. I decided to try the syzr because I have difficulty getting the cleats set up for my knees and I'm a big fan of their road pedals.
The pedals require a fair bit of work to get installed. As one reviewer pointed out they have a lot of screws. Screws on the cleats to adjust how much float you want, screws on the pedals to adjust the tension. I wanted full float so I backed out the four screws on the cleat and haven't touched them since.
First few rides were terrible. I popped out frequently and for no good reason. I had not set the tension, it came very loose. I cranked the tension down and that pretty much eliminated the unexpected releasing. You do have to be a bit careful to not ride on your tippy toes, but that wasn't much of an adjustment for me.
I haven't had much problem getting into them. I don't find it be much harder than any other offroad pedal system I've used. I've been riding them for about 1.5 months and have not lubed the pedal yet, but have had no issues getting in and out. I have yet to ride them in really muddy conditions, so I can't comment on that part yet. But I did do very technical 2.5 hour XC race and had no complaints.
The float is fantastic. It really is free float and is far greater then any other pedal system.
So far I'm quite pleased. I have some concerns with long term reliability since the cleat itself moves on the shoe for the float. I don't know how that will wear in the long run, but it hasn't been a problem so far. Again, no mud experience but I have no reason to believe it would be an issue.
Update- July 2016
I've now been riding these pedals for almost a year and have done so in all conditions. I'm now a convert and have purchased 3 sets (2 mtb and 1 CX). They have performed wonderfully in nearly all conditions, even quite muddy. They are holding up well. I have yet to replace the cleats which was my main area of concern. They are holding up well as are the pedals themselves. Upping my rating to 5 starts since I've had no issues.