I have read generally positive comments on these in the forums of the link below, havent used em myself. Jist of it is theyre like toe clips without having to reach down and unstrap feet. Some folks complain they are tough to get in to as strap droops down after some period of use. If that strap is leather, maybe you can soak em in tannic acid solution to make them more rigid. Mtbr.com reviews of this product (their forum search feature hasnt worked for months, dont waste your time):
I recall in some of the forum discussions folks mentioned one sided clipless (other side platform) as good alternative. Crank brothers Candy pedals can clip or platform both sides.
My personal favorites are speedplay frogs. They are easy in/out and are somewhat unique in that they have excessive "float" and no spring recentering mechanism. These features make them an excellent choice for folks with knee problems.
1. They are not an inexpensive pedal and are rarely discounted. Nashbar or performance couponed down is best bet.
2. The little nub that keeps your heel from rotating inwards (the only physical constraint on float) can get ground off from a single good pedal strike onto pavement. They still work after this but there is nothing to prevent you from smacking a chainstay with your heel if youre sloppy. The "like new" ones sold on ebay usually have this damage, which is never mentioned and frequently concealed by intentionally poorly focused pics of black polymer pedal body. You can order replacement pedal bodies, but only thru authorized dealers for ~50 bucks. The spindles and bearings dont seem to ever wear out.
3. The plastic pedal body deflects enough from routine pedaling that the steel cleat will cut a 180 degree arc into the pedal body, so over time the pedal to cleat interface beomes "sloppy" and you'll feel/hear a faint click clack if you go into a sprint.
4. The new generation 3 cleat is a more robust design, less susceptible to catastropic damage from walking around on rocks/gravel (they got rid of the mushrooms).
probably more than you care to hear about an obscure mtb pedal, but thats the lowdown based on 2 pedals lasting about 35,000 miles of mostly road use.