Might I suggest getting a second tank
I use the same tank, but cleanup can be a pain in the arse on the road. Especially if you use multiple flavors.
As far as reviews, I've seen a few. They are like you said, lacking. There is/was a flaw in the coil production, that makes for the occasional hard to fit issue. I'm guessing this is/was a machine out of spec issue. Because it only happens with a few coils. I haven't noticed this issue with the vertical coils or the RBD.
Mine leak, if I lay them down. But I work in a high vibration environment, this could be a factor.
Leaking can be reduced, by insuring the tank is tightly sealed. I'm lazy, so it took a couple of days for me to realize I wasn't getting the glass tightened against the seal as needed. Don't do this while it's on your battery, do it before you place it on. Altitude changes can also cause leaks, massive leaks!
Cleaning: We all have different expectations. But I like to take mine down completely. The glass can be a tight fit, so soak in warm water, then use a pair of rubber gloves for extra grip. Simple twist and remove. Or take the lazy way, rinse the tank and call it done.
Bad Coils: You'll get the occasional quick burn out. But the majority of mine have lasted at least a week, most last a bit longer.
I like this tank for a multitude of reasons. The main reason, the amount of juice it holds.
I'm sure there is better out there. And I'll be buying a third in the future, as I'm often in an impossible situation to refill a tank. As a rule, I top the tank off when the juice hits the top edge of the coil. Not required, but it's what I do.
High VG: I use 80%+ VG and have had few issues with juice flow or dry hits. I do have a habit of chain vaping occasionally. If you use a high VG mix and chain vape. I recommend hitting on the tip a couple of times, without firing the cart. To insure the coils have plenty of juice.
Flooding vs Leaking: This hasn't really been an issue for me. Other than the occasions I get over zealous while priming a new coil. A quick tip here. Slide the valve to the large opening, and clean inside the opening. I use a napkin or paper towel twisted tightly so it will go into the opening easily and wick up any excess fluid. Otherwise, you quickly discover juice everywhere. A gurgling noise is a dead give away that you'll need to wick the base soon.