Been to a Dozen shops in Phila. and this Zen has had the best prices and the most knowledgeable and friendly staff which to help you make the right decisions on what to get . As my biggest grip with this industry is so many other shops feel like your intruding on their private social club . Making the correct choice on very expensive product to treat my illnesses is my main concern as I was never a smoker and only got the card at my doctor advice and pushing it at every visit replace all the very harmful medications I was on and never been happier living side effect free.