I have had the Volcano from Storz & Bickel (www.storz-bickel.com) for several months now, and have had no complaints. This is the Cadillac of vaporizers. It's a little pricey, but it is well worth it. You have a lightweight bag and mouthpiece to hold your vapors with, and nothing to carry around. The temperature is adjustable and provides monitoring for readiness.

I've recently picked up additional filling gear to allow two bags to be passed around. This helps balance out the costs, if you have a lot of friends to share your vapors with. Good luck with your selection!