I would agree that Tesoro has had some very limited quality control issues, which of course they've taken care of. As far as the knobs turning too easily, although I've never had a problem with that, 25 cents worth of O rings and five minutes of time will cure that. I had a tree limb fall and crush the box of my Tejon. That's certainly not a warranty repair, but Tesoro replaced it for free. I assure you no other company will do that, even within their short warranty periods. So as far as toughness, durability, and peace of mind, they're not perfect, but better than all the rest.