6 months so far and I still look over my shoulder as I'm walking away from it, and yes, I do open the garage occasionally just to take it in for a bit.
It's even worse since I've had the front clip stripped and refinished to get rid of all the little rock chips and scrapes...
I swear the Porsches (Boxsters, Caymans, and 911s) built in the last 15 years or so are among the sexiest and classiest looking cars ever put on the road.