I started with Mighty, DynaVap’s and now TRWW glass, terpedo! I’ve bought mouthpieces, stems and cooling units for DynaVap’s and always looked at his glass items just curious then one day seeing TRWW dude test his terpedo and I had to try it since I thought “you’re getting better with you pocket torch. Well the learning curve wasn’t bad after watching a few videos and experimenting I likey:). The flavors are so much different than the other devices. I’ve only had it for two weeks and still learning. I’m enjoying so much that I’m learning toward his other pieces. They are so pretty too. TRWW dude won’t steer you wrong with his advise either. I’ve been pleasantly surprised. Oh the stem/mouthpiece is his elegant HV03 Heady Cooling Stem. My fingers are nice and cool!