I know this did worry me somewhat. Anyone had a puncture yet or had to use the goo stuff? What's it like?
Depending on what "goo stuff" you're talking about, I've had to use some "green goo stuff" in the past and it does work but it's more like a temp fix until you can get to the nearest tire shop to either change your tire or get it patched or plugged. Would rely on it as a permanent fix in any way.
I have used the goo and pump before. It works, but only to get you to the nearest garage, and only if it is a small puncture, like a nail. If you hit a piece of flint, you definitely will need roadside assistance to go on with your journey.