In stock form, riders at and over 6ft will usually find it a little cramped.  I am 6ft tall.  Mods to the handlebar/riser setup, seat mods and the addition of forward controls has made the bike roomy for me and fits me as well or better than just about any larger bike I've had.  The estimated prices of mods are: handlebar/riser change~$60-$75, seat mods~$5-$15 and forward controls about $100.  So tops about $200 to make the bike fit me perfect.  

Funny thing is that I've done 2 out of three, and often all three mods, to just about every bike I've owned.  

6' myself and like the stock config.
Had the drag bars for awhile and liked them except not being able to see anything besides my shoulders in the mirrors.

I'm gonna try mini apes and the stock '02 seat soon.

I'm 5'11'' and have only owned this bike for about a week now and I find myself trying to scoot back on the seat.  But I haven't done any mods so take that into consideration too.
Good luck.

I would say anyone over 5ft9 (my height) would not be comfortable withouth some mods. My father in law in 6ft+ and he rode mine down the street. He looked like a elephant on a ants back.