I love it. Install was east besides having to remove the stock spoiler lip the 135i comes with. Not sure if it’s exclusive to the M-Sport package but mine had a small lip on the trunk, had to heat it up to be able to remove it then use a grinder with a special attachment to remove the adhesive. The wing fits well and the tape seems to be high quality. Very light, seems to be legit CF. Purchase it if you want a quality wing and have the spare $500!