I love the SpeedPlays... because I didn't like my foot being locked into one spot on the pedal.

Due to the fact that my cleat was positioned wrong for about the first 500 miles on my bike... and because I was mashing the pedals... I ended up with acute knee pain that I had to recover from (it took about 2 months of 10-12 MPH riding to do it!).

So, I switched to SpeedPlays... so I would have to worry about a cleat being positioned properly.

After slow riding and using the SpeedPlays, my knee pain is just about gone (very minor pain flares up on occasion)... another benefit to the pedals... it is SO EASY to clip in and OUT!

So yea... I say... go with the SpeedPlays.