I bought the kit, based on a few people's recommendations on here. I mean what can you say, its a wheel and tyre. As far as space savers go I think it looks quite sexy, compared to the ones of old you used to get and of course it fits perfectly.
I was and still am a bit peeved off by the scissor jack they include. They sell the kit specifically for Tesla's but send some garbage standard jack that isn't fit for purpose without heavy modifications. Apparently they are working on a new version, but they told me that a year ago and ive not seen anything come to light from it.
If you do get one, definitely get yourself a wedge off amazon or something, as when the tyre is flat, you will struggle to get the jack & puck underneath the car.
Other than that, certainly beats being stranded at the side of the road. Does take up quite a bit of boot space though.