Frog pedals have been around for ages with a few dedicated hoppers enjoying the way they do things arse-about-face by putting the spring mechanism (a teeny elastomer) as part of the cleat rather than the pedal. Hmm. Setup is a little more delicate than other pedal systems; some shoes may need chunks of tread hacked off to get the large cleats to fit, and as there's no inward release, cleat positioning has to be a bit more precise.
On the positive side there's plenty of walking-on-ice free float here, with a full 20 degrees of buttery smooth movement to the outside, which is great if you have iffy knees. Small and with no external moving parts, the Frogs are extremely resistant to rock strikes and mud build-up. Internal durability is excellent, and an ickle grub-screw undos should the needle and cartridge bearings need any lube. They're very light but the cleat compensates for this by being large and clumpy, and expensive to replace, and not as widely available in bike shops as other pedal cleats, but they do last. Clipping in isn't as positive as other pedals and it can be difficult to tell if you're in or not, and their inability to release inwards led to more than a few comedy crashes when we needed to unclip in compromising positions.