I've been wanting to try Speedplays.
If you don't like walking on Keo's, you surely will not like walking on Speedplays. The cleats are enormous, containing as they do the infamous 4 hole adapter plate.
I don't have any problems with the Keo Cleat covers, I like them especially as they fit within the tight confines of the tennis ball container I use as all purpose storage in my bottle cage.