I have now been vaping since April 20 after 35 years of being a pack and a half per day Red smoker. Of course, more than a few mistakes were made in my choice of equipment. Also, my taste and habits have evolved even though they're constantly changing.
My first kit was Greensmoke which I quickly returned for a refund due to poor battery life and the ridiculous cost. My second kit was the vapor King- Joye 510 which was almost as expensive. Then I discovered this site and moved over to the mega 510, Toronado (Ego from T W), the Screwdriver MK II, which was replaced by a DSE 905 at about half the price when the Screwdriver fell into Lake Michigan.
Since I work for my computer a lot, I guess I have become a chain vaper. I refuse to drip and use cartos when driving. My opinion is that the 901 works better with the fruit flavors and the 510 better with the cake/coffee flavors. Depending on the juice, I would use mega 510 (not Ego), regular 510, and low resistance 510 and 901. I blend my own juices and had to drop concentration way down to keep my daily dose of nicotine at the same level as when I was smoking analogues. My blood pressure has always been very good, but I was taking in more nicotine than what I was smoking analogues and my blood pressure started to climb.
IMHO, it is very important to give your own background on vaping when doing a review since it is bound to color your opinion dramatically. A light smoker would probably be happy with the standard two-piece mini.
Now to the Little Sister. My package arrived quickly, but there were a few parts missing. Mistakes happen, but Ken responded quickly, and the problem was resolved. I always wanted to go to a higher voltage, but those units are really big. Even now, I only take my Titan 510 when I am out in public.
My first impression is that this unit is really, really small. The nifty little voltmeter, an optional cost, allows me to experiment and play with various combinations of juices and attys. I've also found that the higher voltage allows me to do a better quick burn in order to rescue bad attys.
What can I say? The unit works and does what it's supposed to. Is it something that I would recommend for everyone interested in having an adjustable voltage unit? Heavy emphasis here on everyone.
The answer is a clear no. The small, ergonomic package is both an advantage and disadvantage. You need to pop the unit open in order to replace the batteries, which is an inconvenience; due to their size and capacity (10440s at 3.7 v and 350 ma, which in this unit would be about the same as a mega 510 because of the way it is wired), you will not get much vaping out of them. The batteries are cheap enough, and you can get 500 ma batteries although they are not protected. The Little Sister has its own protection circuit so you get away with using nonprotected batteries. There may be a USB or car charger available for this kind of battery, but I have not been able to find one. So you will need to have plenty of charged batteries on hand, especially if go out with the unit or are in your car for a long period.
For me, it would not be suitable as my primary and sole vaping unit because of the limited battery capacity, the complexity of swapping batteries, and the limited charging methods. So far, I have not seen a lot of difference between vaping with a low resistance atty compared to the higher voltage, but I have not had a lot of time to experiment.
Do I think I got my money's worth? The answer is yes, but there is a penalty for the small, ergonomic package.