My experience is that if you want good vapour, be ready to drop a couple hundred... Save yourself time, disappointment and money.
From having an Alfa, I got a Mighty, and most recently a vapcap. They all have their place: The Alfa is pocketable and produces decent vapour; The Mighty has basically no learning curve; and the vapcap, is more of a 1 hitter rather than a "session" vape, but it's super discrete and basically indestructible. It has the best value for money.
If anyone is interested, send me a PM for free shipping from Dynavap.