The Magic Flight Launch Box is a great vape. I've had mine for about a year now. The batteries last a little longer than what you might have read. I find that 2 batteries will last me and my friends all night. Get a few extras though. The wall adapter is good too, let's you control the heat. It's like $60 extra though. Also you have a lifetime warranty, even if you rip the screen yourself. In my opinion it's the best portable vape because you can conceal it in the palm of your hand. Personally used mine at Yankee Stadium with nobody being wise to it.
HOWEVER, not an ideal vape for a big group of people. If you are trying to get ripped fast, it's not going to happen. Takes a while to get back to you, needs to be packed multiple times etc. So after doing a ton of research I ordered the Extreme Q by Arizer. Glad to see people in this thread are singing it's praises. I should be getting it in the next few days.
I had the Vapir No2 for a little bit. Wound up returning it because of the notorious plastic taste. It did the trick though and in my opinion was more conservative than any other vape I've tried. But after stumbling across
FuckCombustion.com and reading about the same taste I was getting I returned it for the MFLB.
I suggest doing some research though man. Youtube has a fair amount of vape reviews. These things are not exactly cheap, so make sure you get the one that suits your needs best.