Don't own one
But did once have one for the day while my bike was in being worked on.
The first thing I noticed was how much you sit in the bike, as opposed to on top of it.
You feel sort of enveloped in it's bodywork which makes it feel almost like a faired bike.
Of course perfromance goes without saying.
It is a naked Hayabusa with the engine in a slightly different state of tune with more lower and midrange grunt.
Erm, like the Hayabusa doesn't have plenty of that already
The've been able to achieve this by taking a bit away from the top end.
I found it supremely capable and comfortable, and whilst I was riding it even thought it would make a good long distance tourer, but for it's lack of luggage carrying ability and of course pillion accomodation.
I have heard of people coming unstuck by fitting aftermarket silencers to replace the ugly OE items.
A mechanic I spoke to said you can't just bung em on.
People labour under a myth that EFI magically self compensates for reduced back pressure which it doesn't (always), and he's seen a few with burn't out exhaust valves as a result of fitting aftermarket cans without correctly setting up the efi by remapping, (Power commanders are good apparently).
The B King hasn't been a big success for Suzuki and there are some good deals to be had as a result.
If there's one thing I've learned about owning bikes no one else buys (and I've had a few), is that given time, when they become as rare as hens teeth, suddenly everyone wants one.