I hate 'em. I guess it makes for a good 'track' look, but not for the street, IMO. I've also heard they've collected quite a bit of shin flesh from their owners... OW
Of course I don't have a car yet, but I plan to have no quickjacks or bumpers. The bumpers would be a good idea to protect the body from being hit, but if the quickjacks aren't functional, maybe the frame isn't strong enough for the bumpers to work properly either... I'm not that fond of chrome, so the bumpers don't do much for me either.
The front quickjacks don't support the body, but the back ones do. My plan is to have no holes drilled for either the front or back, then mount a nut inside the back of the body to attach those two points to the frame. If you can successfully fill the front holes, you could fill the back ones easily.
As usual, my $0.02
Steve