I recently became a dealer for them, and have had a lot of conversations with Mark. In my (albeit relatively short) time dealing with him, I have never heard him berate another product. IMHO, he's a nice guy selling a great product.
I'm a member of another infamous SOF site and have sent some to some members there, don't want to break any rules by mentioning another site so I won't spell it out. I use it on all my guns (I compete in both GSSF and IDPA) and swear by it. I have a lot of 1911s and every one of them feels like it's on rails after I put this product on it, my other weapons too. My former gunsmith, the world famous Tommy Abernathy (of Tommy Gunz fame) used it and his son Jeff is carrying the legacy. He's the one that turned me onto it, and is currently a pistolsmith for Para.
The bottles are small, I'll give you that, but the amount you need to put on a weapon is tiny for the payout you get.
I am currently a banker, but I have a military background. I am in no way paid by Gun Butter. I was using Castrol Syntec as a lube for most of my weapons after someone who shoots for a living in a very secretive unit told me that's what he and his team used, but this stuff has more viscosity. Sorry if I spelled that wrong.
For what it's worth, I'm sorry if you had a bad experience with Mark. Whether you like him or not, the product speaks for itself and is worth a try.
Scotty (same moniker as the other site)