RE: Spare wheel
Purchased the spare metallic wheel as well.
I can confirm that a full sized wheel cannot fit inside the spare wheel compartment at least for a 18 alloy (outer diameter of the compartment to small) since i've tried it with no luck and you have to inevitably raise the lower cover for it to fit.
Speaking out of personal experience the tyre repair kit is completely useless for anything above a small hole caused from e.g a spring that you may step onto(provided of course it is still in place inside the tyre, if it is removed you are pretty much done).
Had an incident with a flat tyre in the country side 2 hours away from anykind of tyre repair shop. With a proper spare i would have been again on the road in 20mins instead i wasted 4 hours,2 waiting for road assistance to get on the spot and another 2 travelling to the repair shop.