“I purchased this along with the Magneto pen and this one is much better (same price) due to the 4 vs. 3 coils, but larger bowl (pen equiv) which allows for less hassle of reloading the chamber.”
“This is the one you want. Lots of power, good battery life, solid construction. You'll want to buy some extra coils.
Bonus: They can be easily cleaned in alcohol.”
“It works very well and the battery last a while and very easy to clean I can smoke exactly what I want in a shirt amount of time. I very much like the 4 coils”