I have the .454 Casull with the 6.5" barrel. I think it's the heaviest recoiling BFR model.
The .500 is a pussycat according to those who have shot it, as it's so big and heavy.
Well, even my 454 BFR is nothing compared to my friend's Gary Reeder .500 Linebaugh. It's a modified Ruger SBH so it's like two pounds lighter than the .500 BFR or S&W yet handloads are more powerful than the .500 S&W
But I digress. The BFR is big hunk of steel in a positive sense, easy to believe it will take the punishment of the high power cartridges without problems. Finish is good but not Gary Reeder custom quality. Trigger is nice and crisp and the gun is quite accurate (easily shoots 1" groups at 25 meters offhand if I do my part).
The original rubber grips are horribly ugly and very uncomfortable. They are too big to get a good grip unless you have really, really huge hands. Many people seem to think it's a good idea to put oversize grips on guns with heavy recoil but they only make it more difficult for themselves to hang on to the gun. The physiology of the human hand is such that it's easier to tighly grip smaller objects than big ones. And the rubber is too hard to have any real cushioning effect.
The Micarta grips available from Magnum Research look very nice and are much more comfortable.
All in all I think it's good value if you want a really powerful and accurate revolver without spending "custom money".