Used to own one, and loved it - neighbour ran it over in our shared driveway, and that's the only reason I don't have it anymore.
Handling is good with stock suspension. It's a very comfortable sport bike. Try
http://cycle-ergo.com to compare the riding position to whatever bikes you have now.
It's surprisingly easy to speed (and not realize it) on this bike - they did a ton of fluid dynamic testing, so the rider's cockpit is very well protected from wind.
As to what to expect from it... If it's a 2009+ model, you will have stator issues. HD demanded more electrical power so people could install all the electrical crap HD riders usually have put on their bikes - unfortunately, they didn't redo the stator oil jetting and they burn out. People have experimented with various rewind companies (check out badweatherbikers.com) with varying success rates.
The other problem that they usually ran into was leaking from the clutch weep hole - they released a fix for it, but it's something to pay attention to.
Friend of mine in the US is selling his barely used one and has offered me a great deal on it, but I'm not going to buy it simply because HD has dropped all parts support. If I was going to buy it, I'd need to find a salvage titled one to go along with it simply as a parts bike.
As for Komodo's comments on it, I thought the front brake wasn't bad at all - maybe 'cause I changed the fluid out for race fluid and swapped out the levers too. The bike is definitely wider than most sport bikes, but also shorter, which gives it it's quick turn ability. Agreed, it does run out of steam up top, but it has a good amount of grunt for corner drive etc.