Hey hey
I have the NO2 and it is actually the only vaporizer I have ever owned.
I am not very happy with it although I don't have experiences with other vaporizers to compare to.
The battery loses charge quickly, and if I didn't have a plug in in my car it would be useless for travel.
I can never get to that higher plateau as I can with a joint, and I have to take several hits from it to get any effects. It has a weird synthetic taste which makes me wonder if it is really the healthier way to go.
Also, now when I have it lugged in and in charging mode, it makes a sort of never ending beep. You can only hear it if its close to your head but its not enjoyable!
The reason I like it is because I can take it to the movies, which is something high up on my list :-)
I went to go see Pina 2011 in 3D at HIFF and it was a full theater and I had no problems.

Now my question is if any of my issues with the NO2 are common with portable vaporizers? Should I stick with this one or is there much better portable ones out there?

I don't have that device, but here is a link to a discussion forum covering all the different vaporizers: http://www.fuckcombustion.com/forums/vaporizer-discussion.4/ and in particular the N02: http://www.fuckcombustion.com/threads/vapir-no2.1694/unread

Awesome thanks :-)

I love my Extream Q.