This afternoon, I asked Bill if he had many people come thru school with RDS sights, how they did, and what he thought of them versus iron sights. He said he had three shooters with RDS sights in a class about a month back and that they finished 1,2 and 3 in the class. As to how they compare to iron sights, he said the comparison was similar to the difference between an Aimpoint and iron sights on a carbine, and there was no doubt in his mind that they are better. He is now working on new holsters for the Glock and M&P that protect the optic from damage and debris.