I have used RPM on my 2019 M3 SR for tint and a number of accessories, most were installed by RPM.
On my 2022 M3P I have had RPM install accessories in their new beautiful store.
It's 8am, I'm sitting at my computer with cell phone in hand waiting for them to open at 9 so I can set up an install. Friday, I was told my upgraded fog lights arrived and I would love them to install.
For me to get to RPM, it's an hour and a half of canyon driving but since I've never had a problem with any order or installation, I think it's worth the drive.