I use them. 195 lb rider, bike is a Surly Cross Check. They work fine. Set them up with a long straddle wire. Aim for a 90 degree angle between the wire and brake arm when the pads are against the rim.
I use Velo-Orange no-squeal pads. Some folks think those are too soft or something but I have had good luck with them.
Update: I take back my comment about the V-O pads. They definitely do not squeal which was their main selling point but with more experience they really don't stop well and I think they scrub your rims away. Kool Stop pads are great, also Mike's Bikes has the Bike Smart brand and those pads are surprisingly good IMHO. I stand by my comments on the CR-720s, with good pads they are excellent brakes.
Last edited by Al Criner; 11-22-20 at 02:33 PM.
Reason: Additional experience.