I have not tried the Blackhawk holster. I got a Fobus paddle holster long before the Blackhawks came out and I've had no reason to try anything else. The Fobus paddle is the most comfortable way I have ever found to carry a heavy Glock 21. So far I have not had a single mishap, and it has taken a beating over the years. I don't remember how many years ago I bought it, but it was when they first came out. I later bought a K-frame and J-frame paddle, but I don't carry them as much. I just stick the J-frame in a pocket holster.