The tank seems half thought, There are some good features, (Leak proof, Child lock) but the rest of the tank is lacking.

The airflow is tight with only one airflow
It isn't really a 'cloud tank' if that's something you look for

I got a red tank and the paint was chipped on the top when I received it and it now has 2 more chips.

I burnt through both stock coils within days,
I went within the wattage and temperature limits and primed and let the ejuice soak for 30mins-1hour but they burnt up almost instantly, I think it might be a wicking issue

I have this tank already for some time now & it's still like new-thinking of getting another one

Love this tank (it's a Kanger so what's not to love?) I have more than one Kanger tank & have had no issues with either of them. I have been vaping for over 3 years now & of all the mods & tanks I have Kanger is my favorite

Like another reviewer said, the airflow isn't great. It will also 'whistle' if you draw deep (and if you want a good hit, you have to). But the child-proof lock is good if you have kids and it's never leaked on me. The refill is pretty easy, easier than the Kanger Nano, as you can remove the coil entirely to fill or just fill along the side of it without accidentally dripping into the coil itself (I've ruined two coils that way on the nano).

That said, I'm a relatively new vaper and have already figured out some downsides to this. The price is very attractive but whether you are new to mods and just looking for something inexpensive or an experienced vaper, this may not be the best bet. The Kanger Nano I bought at the same time and it is so much better. 100x better flavor with Clapton coils and better even with standard coils. It also produces much more vapor. And in my opinion, this tank does not handle 100% VG very well. It doesn't burn, but it also barely hits and you have to draw very, very hard to get even a decent hit. I bought this in black and red, and both scratch easily, as well. Not a big deal for me, but it might bother some.

***TLDR: This tank is best for very strong flavors (mint, coconut, licorice, etc) or for high PG juices. I would strongly recommend against it for very high VG juices or someone looking to chase clouds. Spend the extra $10-12 on a better tank (Uwell Crown, Kanger Nano/Mini, etc), especially if you're new and wanting a good first experience to mod vaping.

[Vaped on a 60W Koopor Mini w/ 0.5 ohm coil at 30-40W, mostly 35W]

Tank is good quality and has some nice features... Top Fill, no leaks, Child Proof top is nice touch - but it has only a single air intake slot, and it just doesn't get very good flow... way to hard to draw for my take.

Granted I've only had my Kanger CL sub tank a week ten days now, in that time it has gotten a lot of air time so to speak. At first like I am with most sub tanks I wasn't so sure if I had made the proper purchase. Now that I've given it some air time, using a variety of different mods, from my Joyetech Cuboid, to my new Sigelei 213 also my Reuleaux RX200, and a couple other mods that I wanted to try it out with. I must say that this tank has preformed flawlessly. No leaks, no whistle, no anything, if there was a negative I wouls have to say that the air flow could be opened up a tad, Outside that I find no fault at all with this 4 ml tank, it has taken my max VG juice and sucked it down like the champ it is. With a name like Kanger could it be anything but great!