I’ve been really happy with mine. On crap Cheshire roads I’ve been running them at 60psi and they’ve made a huge difference to ride comfort, especially given my frame is quite unforgiving. I’ve had a couple of small punctures that sealed fine and saved me stopping, and the one that didn’t was only because the Lifeline sealant is crap rather than a fault of the system. I’m a convert, you should see ride comfort as the primary gain rather than puncture protection. They’re like 100x more practical tubulars.