Good and short. Seriously though, I think I held my breath from the 2nd bolt to the dyno! Don't stress the R rating, swinging into the rock or hitting the ground from the dyno would suck, but you aren't risking your life. Unless your legs are as weak as Kevin Ware's, you'll be fine. Note my low rating under "exposure." ;)
http://www.youtube.com/watch?v=S1I46lOr65o Here's me getting it on my 3rd go! ...yeah, I'm one of those guys who occasionally sets up gopros when I climb. Lame, I know.
V4/V5 thing. Lots of fun, the R rating is a bit much, as long as you aren't getting a noob to belay or someone who's just eaten a bucket of greasy fried chicken you should be fine. Even if you did deck you aren't falling very far and are looking at maybe a sprained ankle assuming the rope didn't slow down your fall whatsoever.