When i think of paddle holsters the first thing I think about are Fobus holsters.  I see many people bitch about them online but I have not had any bad experiences with them.   The only complaint I have about paddle holsters is they are very uncomfortable to use when shooting from prone.  I wore one to the range during a glass and switched to my Elite Survival drop leg holsters to free up my waist.  Fobus holsters are really nice to use in the winter or for open carry because they are so easy to get on and off and they only cost about $20.  For someoone that is taking a defensive training course we always sell them a Fobus paddle holster and then a Woolrich Elite lightweight vest.   I would say that I am not a fan of the Fobus magazine holders because they are just too bulky, the Blackhawk magazine holders are better contoured.

The simple answer for which paddle holster you should use would be to ask  yourself if you want retention or not.  Blackhawk Serpa holsters are very big with Glock guys and the Safariland holsters for Glocks are very very popular because of the retention.  If you don’t want any type of firearm retention you have many other options out there. There are Desantis holsters, Galco holsters, Fobus and many more that make decent paddle holsters but there are huge price differences.   I usually stick with Fobus and Blackhawk to make it simple but I have had some reasons to acquire the Safariland holsters, too.