Im going to be a bit of a dissenter here. I used Frog Lube for a number of years, starting when it first showed up. Used it, and only it, for most of that time. I no longer use it.
They changed the instructions for use as well as the consistency over the time I used it. When it first came out, they recommend you heat the gun in some manner, leave it in the sun, warm it with a hairdryer, etc., prior to cleaning. When I quit using it, they no longer had that in the instructions on the bottles, but did have it on their website, and then it was only being recommended for being done prior to long term storage.
The consistency of the product changed over those couple of years too. When I first started using it, it the liquid was quite thick. When I quit, it was noticeably more watered down.
The first thing I noticed outright was, it didnt do anything for removing copper fouling. I never saw anywhere that they said it would, but I guess I assumed since it was a bore cleaner too, it would. I emailed and asked, and they said it wouldnt, and I had to buy their "solvent" for that. I got that, and it did absolutely nothing and cleaned less than the CLP.
I always used it as directed, and never slopped it on, or loaded the gun/parts up with it. As long as I was using the gun regularly, it seemed to work OK. If let the gun sit any length of time, there were function problems until the gun got warmed up. I noticed this more with my revolvers, and the cylinders being very sluggish, but I also had trouble with a couple of autoloaders as well, and it took a couple of mags before the gun would function properly.
Just before I quit using it, I ran into some rust issues with it, which kind of surprised me. I had put my model 28 Smith away after shooting/cleaning, and a week later, noticed light rust on a number of places on the gun. I also ran into this with one of my other blued rifles as well.
I always wondered if that had anything to do with the liquid being watered down, as I never noticed the problem when I was using it early on.
One other thing that got old for me, was the price. They sure are proud of it, and arent afraid to charge you. $14 for a little bottle, that doesnt last all that long if you shoot/clean a lot, starts to get old, and expensive.
When I think back on things, I think their marketing is a lot like the old electric shavers marketing was/is. They tell you not to use anything else and youll see its as good or better. But if you dont continue to do a comparison through the process, you really dont notice that youre accepting their claims without any real verification. If you had, you'd see that they were being very generous in their claims.
Im back to using good old Hopes for cleaning, and using Mobil One for a lube. If Im worried about rust long term, I wipe things down with Eezox. Im putting the money saved back into components, and shooting more.