The tuning box that you've posted from eBay is very similar to what I used on my One D (also my first MINI). It was very good, and did give the car a bit more of a kick, but, it did smoke a bit when putting your foot down. Unfortunately I wasn't in a MINI club at te time so can't give you any figures from a rolling road.

Performance Torque is my current remap on the Cooper S, the team are very good, but your going to be paying more that your eBay plug and go box - which I think increases the pressure somewhere on the system to get more fuel and air into the engine.

Once advantage to this little box is it's in and out of the car in about 5 minutes for servicing and warranty work

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