Originally Posted by
AlexCyclistRoch
A $20 pedal will almost certainly have a plastic sleeve bearing, and will wear out fairly quickly. You can try different types of cheapo clipless pedals (Wellgo and Nashbar brands come to mind), so if you don't like it, you're only out a few bucks.
Or, you can go legit Shimano. These things are bullet proof. I run them on all of my bikes, mountain to fixed to road.
Shimano PD-M520 SPD Pedals > Components > Pedals > Mountain Pedals | Jenson USA