Well the good, the bad and the ugly... It's an easy setup (at least for me) you "trap" the coils on the velocity style, I believe it is, deck. I use rayon, and that thing never leaks, it was the first RTA I felt comfortable taking out of the house. As far as airflow, it's adjustable, to a point. I actually like it even wide open, but at that point I think I am doing more of a restricted lung hit. It's a thirsty tank on any setting, but closing down the airflow does help a bit. I found the vape pretty similar in either version (and I like them both).
As far as flavor, IMO it shines best with strong fruit flavors. Some folks really find the flavor muted, it's my opinion you need to find the right juices for this tank, and perhaps "subtle" isn't it. I'd say the main complaints are about airflow (may not be a concern for you, it's a bit of a crossover tank IMO) and flavor, which I will comment that if you have a very subtle or less flavored juice in there, you may not be the happiest. My favorite (DIY) flavor in it so far is bilberry plus heaven, or mango/peach/pomegranate. That type of juice. I will say that if you don't find a juice that "works" you may be unhappy with flavor, but I don't find myself unhappy with what I use. I think certain flavor concerns are legit, possibly.
I will say that the 24 vs 22, very similar/identical setup and build. I have one I use in TC mode on a steampunk and put the smaller diameter on a provari dragon.
Top refill is super easy, and I haven't experienced a drop of leakage. The only time it leaks is right after it dies, which time has increased slightly reducing wick in the coil a bit (was having wicks break in half in my coil) but other than that, (since I've reduced wicking a hair, the rayon wick lasts longer).
Hope any of this is useful....
Anna