I bought the official BMW part for this because I'm a sucker. My only complaint is that it does make the fob significantly thicker. But it does prevent accidentally activating the panic mode, which I've been known to do
overall would I say it's worth it? eh, if you like leather and don't mind it being fat then yes, it's nice!
color: Sattelbraun
part # 82-29-2-408-818