If you had shown me the official normal floating center caps and the Bimmer Plug floating center caps and asked me which one was made by BMW, I would have guessed incorrectly. The Bimmer Plug floating center caps are a next-level quality. They make the official ones look silly. I don't know if Bimmer Plug needed to over-engineer them to get them perfect, but they sure do feel like they are more than worth the price. As others have pointed out, the Bimmer Plug version does poke out a tiny bit more than the BMW ones. It isn't bad or good, but it is a difference.
For those that care about design, I would also make the observation that the logo has enough going on in it that the details really get lost when presented in the small center cap size. If you are looking for quick brand recognition, you may want to stick with the standard logo.