[SpeedBuggy]

Currently own a 2018 X1 with 72,000 miles on the clock, purchased as a demo. No issues so far and still on original brake rotors although pads were replaced at approximately 40,000 miles. The 4 cylinder performs well and getting 29-30 mpg, most of my travel is highway.

Mine also has the storage underneath the floor in the rear and stores quite a bit. The floor is removable.
Not sure if the rear floor is standard or an option, may have something to do with the non run flat tire option. Maybe someone else can chime in.

Do recommend the sort seats. Mine is not loaded up on options, but it did need to have sport seats. It's not a M Sport but had the sport seats as an option. Sport seats have proven to be quite comfortable and feel they are a bit more comfortable than the sport seats in our X3

good luck with your search.