My wife just laughs when she sees my ear to ear grin when I leave for a drive and pull back into the driveway. She still can't get over how loud it is, but enjoys going out for a ride (with earplugs) every now and then.
The only "agreement" is that she gets to park her baby (SLK320) in the garage, so I don't have any room for more toys. Oh well, if you're going to have one toy, this a great one!