I.m definitely loving the car when its going well! My dealership are really really good too (DL in Bristol) and I am really really fussy - its been in a few times for rattles that many other mini owners probably live with, but as a result, even with the
JCW suspension, its a rattle free car at 7000 miles. I had a go in a GP (similar mileage) and it had vibrations throughout the cabin so im happy with the outcome of its many trips to the garage!
Im sure this turbo thing is a freak as i've searched the web and heard no evidence of any other cases.