Stealthiest most reliable hash oil pen?

Hey I'm looking to get a vape pen for wax, figured I ask FC their opinion. Stealth is very important. I want to be able to use it discreetly with as little smell as possible. The Micro G pen for example looks perfect for me, but I've read some negative things about it. Also I've read that it's a "load as you go" type of vape. I've heard of vape pens that if you fill up can last you a good 150+ hits. That would be much more ideal for me.
I figure I want something nice and small, that also doesn't require a lot of maintenance and reloading.
So quality, not big or flashy, and minimal smell. Give me some ideas. Thanks

Tons of ideas here: http://fuckcombustion.com/forums/portable-vaporizers.39/

There are tons of ideas, user opinions, reviews, and more.
Maybe then after you have seen a couple models you like, hit people for specific questions on those models.

http://fuckcombustion.com/threads/omicron-vaporizer-for-oils.4301/

I like the Dr. Dabber pen for stealth with oils while I am out. In fact, it will be my go to device for MegaCon this year!