One thing I noticed in the reviews of the Dinan tuned M550i is that the reviewers kept quoting $14K as the S1 price and then saying that for an extra $14K you might as well get a M5.
They seem to have overlooked that the S1 is only $4.5K and the extra $10K was due to the wheels and carbon fiber trim pieces.
Just something you may want to make more obvious to reviewers when you drop off the car.
