I saw those in store a while ago and the quality control with them is all over the board. I would guess maybe 10-15% of them would turn out to be nice useful tools. Many had ratchet teeth that were ground at a slight angle, ratchet teeth that were rounded off so it wouldn't take much torque for the pawl to slip, etc. If you want one make sure you buy it in store so you can pick the best one, don't order it online and take a chance.
I have the 3pc angled Craftsman versions and they work well, but like the other posters said they don't ratchet well once a screw is loose. Now I use them just to tighten and break loose a screw. To fully remove the screw I switch to a 1/4" nut driver and a small right angle Milwaukee bit adapter instead. I took the large wing handle off of it to keep it more compact.