I am not a big lover of the space saver wheel and tyre myself.
They should be treated with the greatest of respect and used for very limited use.
I have seen on two incidences, cars been driven on the motorway ( at speed ) with a space saver wheel fitted !.
There is a car that drops off two small children, outside of our local school, that has had a space saver in place now for nearly one month !.
You want to say something, but you really have to hold back.
The problem here is, that some people think that because the car is supplied with a suitable wheel and tyre, it is a straight replacement for the full sized wheel !!!.
I would ONLY even use the space saver to either get me home ( if the distance was very short ) or to get me to the nearest tyre shop !.