I've been wondering how well the seat keeps you from sliding back at full acceleration? I'm coming from a SV650 that has a distinct step, the 09 slopes up so gently it looks like it could have you gripping with your thighs etc just to stay on lol. And it is a %50 increase in HP for me.
I guess the seat strap could be handy for holding the bike balanced as you put it on/off a swing arm stand. Last bike I had with strap was in the '70s, it had a center stand, and I'd never heard of a swing arm stand lol.
The SV I usually didn't have the passenger hand hold installed, if I wanted to get grip in the garage I popped the rear seat off.