It's cool, but I'm thinking it's not $48 cool (and rising).
well sure, but most failsafes don't need to be there either. Just a trick little piece of mind IMO...I've read in other online sources that there is no need for an actual fuel cap. In fact, when the dealers prep the vehicles they're supposed to take OUT the green plastic insert on the fuel neck.
My truck came w/ that plastic insert cap and I'll just simply keep it there. I don't see how it can hurt.....