I've been commuting for eight years on Marathons 622 x 47 (700 X47); both in Germany and the US. I average about 5000 miles a year and have never had a flat with the Marathons that had to be repaired on the road. A few developed slow leaks while at work or at home but my (non-plus) Marathons have been as dependable as can be; last a long time too.