After using the 4 valveYJs titans I wouldn't want to use anything else. I would not want to go back to a 2 valve set they just make pulling a vac so much easier and the forth valve works perfect for hooking up your vac guage. That said the digis sure do look cool but since i spend more time in the office than the field i just cant see getting them and I dont want to spend that much for my techs to abuse.