2.Which kind of vape pen did/do you use? (If not, simply answer "Joyetech Unimax25")
I have been using something similar; the Kangertech Subvod for well over a year now. I also have the Mega. Same concept. I take it with me when running errands, etc. The Mega is the most similar to the Unimax. Just to expound, it is quite easy to transport. The Unimax 25 would be easy as well. The main difference is the coils. Although the SubVod will take a 0.50 coil, provide you with outstanding flavor, it will not provide you with the vapor production the Unimax does. Both have a pass through as well.
In my opinion, the Unimax beats the SubVod hands down.