I have the Trinity's and yes they offer a 30 day money back guarantee which they don't hesistate to tell you about. The Trinity's are an absolute work of art no doubt. They have the best fit and detailed finish of any pipe out there. But for 700 bones they should. They are easy to install, double o-ring sealed everywhere, SS allen head bolts for mounting. No pipe clamps needed though toomey I think offers this too. Also a plus is the billet rear clamps and end cap (very nicely done). They won't rust or dent as easy since they are stainless. They do weigh more than regular steel but not much. Performance wise, I couldn't give just a difference with the pipe alone. I added porting at the same as well as many other mods. They sound really great and just a tad lower volume than my fmf fatties they replaced. Only complaint I have about them is they need an o-ring between the can and midpipe. Though the fatties performed well, they didn't hold up to moisture at all and I babied these pipes. Kept them clean and always oiled them after a wash, they still rusted. I think toomey has a way better finish than the fatties though and will probably hold up a lot better. I know that if you get the Trinity's, you won't be disappointed. Performance of the two are really close and it really comes down to, if you are willing to pay the price for the SS and finish. Either way you will probably be happy.