I have these same tires on my hybrid (700x32). I have had two flats after about 1000 miles with no liners. One was a metal shard stuck in the tire which had to be repaired and the other is a mystery, but it was super slow and only pumped the tire to get home (~5 miles). The bike will not get as much use now as I have replaced it as my commuter and have no plans to move them over to my new bike.

However, for the same reasons mentioned above, I will not buy again due to the difficulty in mounting. Getting a flat then struggling to get the tire back on is not fun, plus there are many other tire options out there.