Congratulations on your new car Sam, I never was a Fiat fan until I took redundancy and lost my company car, while looking around my wife saw an 'Idea' said that was for us, must say I'm quite impressed with it, maybe it's the 'Valentino' effect. Mine has one of those space saver tyres in the boot.
I was told by a tyre shop once never to use those 'gunk' canisters, he says the tyre is wrecked after use they can't repair the puncture with that stuff inside.