I have an Airvape X. It was my first vape. It actually has a number of good things about it. It's a combo conduction/convection vape. It is very small, well made, easy to load, decent battery life (though not user-replaceable, one thing the Legacy is supposed to correct) - those are the pros. The cons are that it's really a session vape. When you turn it on, it stays on for a preset period of time which I cannot remember at the moment. The oven is large, with no way to load smaller amounts (another thing the Legacy is supposed to address.) I like it, but like a Mighty without dosing caps, I don't use it unless I plan on finishing the whole bowl at a sitting. I've also pre-ordered a Legacy, which Apollo calls a "pure convection" vape, though they also say that the herb continues to heat when you're not hitting it. There is some sort of microdosing basket included. I go back and forth on cancelling my order. VAS will probably keep me from doing so.