I ordered one for my wife. She loves it but quickly upgraded to a variable voltage and tank setup. I actually like it too. Great vapor in a teeny package. I'll borrow a bat and carto from time to time when I need to be super stealthy.
Here's the goods:
Great quality and vapor for a cigalike
Blank cartos are cheap and you can fill your own (they last about 10 refills tops)
Portable charging case keeps a fresh bat at all times
Great looks and feel for someone getting off cigs
OUTSTANDING customer service. If something doesn't work right they will ship a replacement immediately with no questions asked.
Makes a great backup once you upgrade and will continue to have it's place even once you upgrade
Cons:
Batteries only last 2-4 hours tops depending on how you vape. My quess for most is 2-3 hours.
Cartos only hold about .5ml of usable liquid. They say .7 but never vape to the .... or it will taste like one
808 threaded (this means the cartos and batteries only work with 808 threaded hardware. Most stuff is 510/ego). There are adapters but they don't always work that well.
Flavor and vapor will never be as satisfying as a tank setup.
My wife and I always prefer manual batteries. We have both. Autos are cool for mimicking a cig but manuals are far better with control. Autos are also more airy and they aren't sealed so if juice leaks in it can fry the battery.
SI's juice is pretty ok. Their ry4 is excellent. Best suggestion if you go that route is to buy a tobacco sampler (or any sampler that looks good) and get at least 1 pack of blanks. Filling yourself is simple.
I really can't say enough good things about SI's customer service and fast shipping. They usually ship the same day.
For a beginning vaper, I recommend either the SI volt kits, or the Halo G6 kits...(basically the same thing, slightly different wrappers is all) Both are excellent for the cig-alikes, (I'd recommend the 78mm options, a bit more battery life) Both companies offer amazing products at the price points, awesome customer service, but I have to give the edge to Halo in the juice department. Halo has some outstanding juices.
2-4 hours is about spot on, though you will notice a drop in vapor production at about the half way mark in the time period. Both claim to be regulated, but that was at least my notes on it. If I'm not mistaken, the VOLTs are sealed, even the autos.
SI's customer service is amazing though, the only time I had an issue, they were on top of it, FAST. Top notch CS.
Liquid wise, I've tried the RY4 and the 555, both are good "tobacco" vapes, and have heard great things about some of the fruit flavors as well. It really depends on what flavors you might like though... I though I'd be a tobacco vaper, and to some small extent, I still am, but I tend to prefer sweeter vapes more now, as well as minty (not so much menthol) and am absolutely in love with a cinnamon that I DIY.
None of their liquids are known tank crackers though, so you should be good in those regards.
On the aspect of cartos, when filling yourself, KNOW how to prime them! You'll only ever do a bad prime once, because that first vape on a badly primed carto will fry the batting around the coil and make anything in the carto taste like burnt diaper. Once this happens, there's nothing you can do to salvage it. PBusardo has a great vid about cartos up on youtube, and Baditude here on the ECF has good info on carto priming in his blogs. I highly recommend reading/ watching both.