The MKS EZY pedal pops off instantly and can be rebuilt with simple tools. The bearing races wear quickly for me, but I just keep putting waterproof grease in there and hoping for the best.

I have been running the "superior" version of the MKS for a couple years, maybe 6K miles now. It takes 5 or 10 seconds to get the pedal off due to a locking feature. The bearings are sealed units; less user serviceable I think, but I have not tried. They remain as smooth and free of play as when new. I will not buy another MKS EZY; the bearings wear out too fast for me.

You should use pedal washers with MKS quick release pedals. I had both pedals loosen up once; they damaged the crank arm surface it seats against. I got the washers (and pedals) from Compass cycles.