I'm sure these do a good job but mending a puncture isn't exactly difficult, annoying yes, but so what if it rains? You'll probably get just as wet fitting the fancy, new tube as you would sticking a patch on the old tube or replacing it with a new one.
Schwalbe MPs are about the best insurance you can buy to avoid those nuisance roadside repairs and are well worth the money.
I'm afraid I'm far more concerned at the prospect of punctures in my next car which comes with no spare wheel; only an 'inflation kit' which, if it does the job and gets me to where I need to be, will need to have the gunge replenished, not cheap! Worse still, tyrefitters will not mend a tyre that has been coated with such gunge so that's a new tyre, maybe a pair if you want equality of tread across the axle.
I hadn't realised the demise of the spare wheel, (not even a spacesaver!), was so widespread as it now is but after some research, it seems there are very few cars sold today which come equipped with a proper, full-size spare wheel.
Not so long ago, I had the misfortune to have a blow-out on a French motorway in the middle of nowhere. Had I only had an inflation kit in the boot, it would have been no help whatsoever as there was no tyre left to inflate! Fortunately, I had a spacesaver which allowed me to eventually find a tyrefitter where they actually had my size in stock so I bought a pair which cost me an arm and a leg. It took a long time to recover from the pain in my wallet.
I'm seriously thinking of buying a full-size alloy wheel + tyre and stowing it in the back end, (estate car), just to avoid that stupid and costly inflation kit nonsense.
Tom