I will patch the 700 X 28/32 on my errand bike and notice no difference in rolling.

The skinnier tubes on my road bike I'm less inclined to patch, but I have patched them with very small home-made patches and do not notice any effect. It's best not done in the field as one is tempted to allow insufficient time for the cement to flash off..

My experience with glueless patches was with the Parks when they came out. They seemed to work just fine as long as the tube was cleaned well. I thought they were a bit spendy for what they were.

Tom