I hate to say it, but both the T18 and T22 have not turned out well for me.
At the start, I really enjoyed the T18. Got one for a friend too, and both had the button-stick issue from the first run. I should have exchanged it, but I would have had to pay to mail them back to the vendors. It was just too much effort around the holidays.
The heat on the T18 is really odd; sometimes it gets way too hot, and sometimes it's basically just warm and fine. Even with the same juice, it seems to fluctuate. I can't figure out why. My friend I got it for (who's trying to quit cigs) said that it basically burns his lips, and would not produce much vapor for him. I showed him how to use mine before he opened his, and since it's dummy proof I'm thinking he got a bum unit...in addition to the button issue. I just don't know anymore. I keep trying to walk him through everything over the phone.
I had higher hopes for the T22 for myself, and the heat issue doesn't seem to happen on it, which is good. But for some reason I keep getting burnt hits and bad flavor on this compared to the T18. I can't imagine what the difference is. I've gone through about 10 coils between the 2 units, and I doubt it's a coil issue.
And to top off my dismay....both units give me a mouth full of juice about every 10 draws. It's gross, and just ruins what could have been my favorite mouth to lung device ever. But putting all these things together, I'm pretty soured. I put in well over $100 into the Enduras and I really don't feel positive about it anymore.
I really wanted this to help a friend quit and give me a satisfying mouth to lung experience...but I'm sad to say it accomplished neither. Just my experience, I had to say it out loud.