I have a Cobra, and it has served me well. I have only had one problem with it. There is a small plastic piece that holds the pivot for the axel. It cracked on mine. Cobra replaced it free of charge, even paid shipping. They told me they have changed the plasic formula that they were using. Using a differentplastic now.. Anyway I put the new one on and no more problems.That was over a season and a half ago.I dont have experience with any other penedulums so I cant say on any others.
I sighted it in from 20 yards on the ground, and it was close from the stand. Did some final tweaking from the stand and it right on. With my Patriot Dually it is dead on from about 5 to just over 30 yards. It helps me not have to worry about distance, just concentrate on my form and shot. I have not missed a deer since I started using it.