After having a 3/4 pack a day habit for about 15 years I have been exclusively vaping since September of '13 and couldn't be happier. I made it a point to try each shop and their juice here in the valley so as to remain objective. I have to admit, its getting harder and harder to keep up as new shops are cropping up every day. No matter how many I try, I keep going back to Extreme. Their juice is by far the most consistent, cleanest, and purest available in the greater phoenix area. Although there are others that may have more flavor the viscosity is either too thick or too thin and varies per batch or are loaded with junk that gunks up your coil in a week. Nobody, and I mean nobody, has nailed the true tobacco flavors better! Its one of the most difficult flavors to master and they have done it in numeros varieties.
As to the equipment, they have all the "latest and greatest" at competitive prices and I have not once seen a clone in the shop. 100% authentic every time. I'm a total tech head so I have run the gamut on gear and always trying new technology. Their employees do know their stuff and have even hipped me to some new products they don't even sell. That demonstrates a commitment to vaping that you will not find anywhere else. As to the staff attitude, all I can say is you get what you give...
As a final note, I live near South Mountain and will gladly take the trek to Extreme to get my fill. That's how adamant I am about the quality products they offer. Don't hesitate to give these guys a try!