I never check luggage anymore and never will as long as the TSA opens and searches our possessions out of sight. I frequently carry a garment bag and have never had it searched at the checkpoint. I always carry some electronics, including a heart monitor I use for running, and always expect that a TSA secret agent will be curious. At the end of a trip, my bag is always full of very "ripe" running clothes that I actually hope someone decides to ruffle through -- without gloves!