They snap on with a satisfying click and there is no slop whatsoever. I say 'they' because I bought a whole bunch of them. Makes perfect sense for Simagic to partner with NRG to make these, and that was a strong selling point for me. I can't say anything about connectivity because I use mine with a collection of classic MOMO steering wheels and those don't have any buttons.
J
JH Torres
Perfect fit
If you want a tight qr for your simagic base without gambling, just buy the official