THe manager of this shop just sold me a Grencoscience G-Pro vaporizer. I'm very new to using a vaporizer and I foolishly trusted him. There products are very over priced. BUYER BEWARE you never know if you are getting a AUTHENTIC or COUNTERFEIT items. There is one employee there that is very sweet and helpful. The manager should take a course in professionalism!Try shopping at CLOUD9 instead. You will be very happy at CLOUD9.