Benefits... Nice big fat tyre. OK, so that might not technically be a benefit if you don't like fat tyres- on paper it's a negative in fact. But, some people like the big tyre, and it looks good. Not for sale just yet though they might be, you never know
21Quest and Billy can tell you more about this, they've both run around with GSXR1100 or B12 wheels, Billy's got one now.
Dead easy to fit- well, can't remember exactly what it calls for, think it's thinning the caliper hanger, and some spacers. I've got the numbers now to figure it out, i think, just not done it yet. 21Quest, again, could probably tell you what's needed but I figure on doing it with replacement bearings and spacers rather than the traditional big captive spacer through the middle.