Engine is great, nice CG, wonderful bikes unless you're tall. At 5-10 I'd find myself wadded up after a day, I know. I keep sitting on them and realizing the cockpit is great for someone 5-6!!!! I think my 1400 is a little like that, but for someone 5-7 with a long body or something like that. Actually, just lifting the bars 2" made it perfect. Much more roomy than the Valk!
They'll handle well enough - have seen them crank through the Dragon at rather nice speed. Then again, a Rocket III all the way over will do quite well. Just takes the fellow who can lean a monster all the way over in control to do it!!
If a Valk fit I would probably have one.