I Frog Lubed my AR, my PX4 Storm and my HK45.
I had no issues before Frog Lubing, so I didn't really notice any bit of difference in any of my firearms, except for the PX4. I had heard that it really smooths out the cycling of the action, and on the PX4 it really did, which ironically is the only gun I did that I didn't do the whole heat up with a hair dryer thing.
Where it shines for me is as a cleaner I don't need to worry about getting on my skin. I sit on my bed and clean my firearms while watching TV/Movies, so having it smell good and be non toxic was great. I suppose if I had really bad lead/copper fouling I'd probably switch to a heavy duty solvent for that cleaning, then go back to the Frog Lube until I needed the solvent again.
Before switching over I had done a lot of reading on forums where strangely enough it's really controversial... lots of internet arguments over a CLP. I don't see it as anything more than a non toxic CLP alternative that smells good, not some wonder product that will shrink my groups and enlarge my #####.