Matthew C.wrote a review of Paul Components Chain Keeper on October 31, 2011
I got the Paul Chain Keeper when I went 1x9, and it is a bit of a pain to set up. And I didn't set it up perfectly the first time, so I got a nice turkey gobble sound each pedal stroke. However, once I got it set up correctly it has kept my chain on over everything I've ridden through. So. Good product, was cheaper than MRP or e*Thirteen, and I like that it's very low profile.