I'm 31 yrs old, I have cancer, am going through chemotherapy, and am having stomach and eating problems.......so I smoke alot of pot. I've heard good things about these vaporizers, but was hoping to talk to or hear from anyone who's actually used one. Like.....Is there any smoke or stink when you use one? I usually smoke pretty good grass, so is a vaporizer worth the $$$$$? Any input would be appreciated.