Huge thumbs up on the Park boot!
I was riding through some leaves in the bike lane and found a hidden sharp rock that sliced a hole in the sidewall, big enough to push my thumb through. I didn't think any boot could hold in that situation, but since the alternative was a 7 mile walk home, I gave it a shot. To my pleasant amazement, it got me home w/o problem. I think the self-adhesive on the boot made the difference between success and failure.