I've had my Kona Dr. Fine for about a month now. The tires it came with were 32 mm Maxxis cheepos, but they seemed fine and were plenty grippy. I got a flat a couple days ago so I decided it was time to toss them since it was only a small metal piece in the center of the tread, which I knew the Hypers could fend off no problem. I swapped the Hypers from my cyclocross bike, also 32 mm, and the difference was much more than I could have ever imagined! I'm one to two gears higher at the same effort now (Alfine 8, so it's a pretty big difference). The pressure is the same, but the ride is so much smoother, the bike is essentially silent over bumps now. I guess I shouldn't be surprised, since the difference in weight is huge and the Hypers have a smoother tread and are much more supple. Since I've never flatted the Hypers over at least 1,000 miles, I'm also feeling more secure about making it to appointments on time. I know I always chime in recommending these tires, but I am now even more a believer. You owe it to yourself to give them a shot. I ordered 35mm to go on the Cyclocross bike to see if there is any noticeable difference on trails. I don't see a need to go over 32 mm for commuting on rough roads, though.