Got mine today.
But I dunno, I must be getting old, I didn't rush to install it.
With snow on the ground and narrow snow tires, the extra power is just going to net more flashing of the traction light. So I am going to wait a couple of days till it's in the mid 40's.
'98 M Roadster stg 2+ S/C @ 13psi +'13 EBII M Sport 328i 6mt BMS stg 1+