only way you acan fail is with the wrong temp or they bust you with it
geonagual Reviewed by geonagual on . Has anyone here failed with QF 4.0? It seems as if it's pretty reliable. When I went today to buy it...there were about 10 people there at the same time to buy it. The guy said it's 500% reliable. He even asked if I needed it heated :thumbsup::thumbsup: Rating: 5