Classy looking mod for the price, BUT, it has voltage drop that you notice. Forget the IJOY 20600 batteries and if you have the Sanyo 20600A batteries they will punch. The same goes for Samsung 25R's. But the Sony VTC5a batteries punch. So if you do not have these or do not plan on getting them do not bother. Also keep you builds around .13 to .16 and NI80 Alien or Clapton builds rock with the correct batteries.
Nice silicon bottle works as it should and it can be broken down for cleaning of the device and the contacts.
All in all good little sqwanker for the money.
Just remember if you are a mech mod user, do not expect the punch of a quality mech mod as regardless of the battery you use, there is still going to be that voltage drop. The battery contact needed silver plating so it is what it is. But the right batteries and build and it works pretty good.