I think it's a great feature! Especially for the '05 HAH, which doesn't have a spare. I need to know about a slow leak before it gets to the point that sidewall flexing heats the tire to the point that it explodes. Had that happen to me twice since living here in Phoenix. Both times, probably started out as slow leaks, but since I was unaware of it, the tire leaked down to the point of catastrophic failure. There isn't any amount of tire sealant that can repair THAT problem!
Also, want to get it for my motorcycle. Blowouts that take out a tire and leave you with ONE tire, sucks!