I have a Fobus paddle hoster that fits both my P12 and SA Champion. IMHO, it offers all that Fobus claims for it, and the price is right for a utility holster for snap-on/snap-off convenience.
Retention is provided principally by the molding captivating the trigger guard. Gun retension is adequate to assure that you can present the gun without 'drawing' the holster, but I'm not really confident that the gun would remain holstered if I fell down.
The holster remains positioned on the waist without tilting.
Overall, good value and serviceable.
My real problem with holsters of this type, whether paddle or belt, is that the thumb safety is exposed. It's really quite easy to accidentally move the thumb safety to fire position by contact between safety and body when you're in and out of your vehicle.
I think my next paddle holster purchase will be a design like the Safariland 5181, featuring the convenience of a paddle with a shield between gun/thumb safety and body. I saw a new Mike Benedict paddle design that looks great, if you want to stay with plastic.