My first road bike came with SPD pedals. The cleats were only $15 so it was the cheapest way to try out clipless. I liked them but ended picking up some used Speedplay Light Actions w/ cleats for $50 on CL. I prefer the free float of the Speedplays and think they're easier to put multiple shims under than those tiny SPD cleats. As long as you don't mind the look of SPD pedals I think they work just as well as any other clipless pedal. I'd probably use something else if you intend to race.