The difficulty with these daft repair kits is that they can't cope with all punctures, and you end up having to buy a new tyre anyway.
Can you imagine being out in the snow, at this time of year, and then being stranded because you haven't got a proper spare ?
When I changed over my Fiesta in March, I took the spare out of my old Fiesta and put into the empty well. I have had this space-saver spare for 6 years, and have had to use it 3 times.
But with this Smart Car, that would not be possible I suppose.