I've been very happy with my Conti Gator Hardshells. Switched my Roubaix to 700x25s with this tire, no flats (knock wood) through multiple centuries in 2010. Also have the same tire in 700x32 on my Soma Double Cross. Ride and handling are excellent for a puncture resistant tire, IMHO. Currently building a bike with 700x35 Michelin Pilot Sports - very curious to see how well they work.