Quick off the line, fast, nimble, and even quicker to stop (gotta love hydraulic discs).
I only have two complaints.
First, you can have a 700x40 tire (actual width including tread) on the front, or you can have proper fenders on the front, but not both. This is somewhat irritating.
Second, and more significantly, I'm having a weird problem with the headset not seeming to want to stay tight. It got loose enough that the stem would rattle over rough ground shortly after I took it home. I got it adjusted at the shop this past Friday, and it's already starting to get loose again. I think I'm going to post on the Kona forums about it. That ain't right, and I'm wondering if it's a problem with the bike or a problem with the shop or what.
I really do love the bike, though. She's a great little multipurpose number. I've got her kitted out with a rack, fenders, an Alfine dynohub wheel, and a set of Busch and Muller lights.