Started with KR808D-1 prefills. Liked them for the first half of the carto...while I was able to keep using them for the 'advertised' length of time...I felt like for the money...I could probably do better. If I am going to start buying juices and 'topping' carts to keep them robust...I might as well try some of the other hardware too right?
Stepped up to an Ego-T with XL batteries.
It works ok...but I just don't like the draw. It's a different kind of draw...
It's very tight...I can suck into my mouth and get clouds of vapor come out my nose...it tastes great. OK, what about a drag straight to my lungs like I do with cigarettes and the 808 cartos? Hmmm...not so good for this. I either have to suck into my mouth, then inhale, or draw really hard...which ends up flooding the atty...the battery often times out before I get a full draw...the whole thing gets really HOT in my hand, battery doesn't last very long when trying to take the long hearty draws, and all the muscles involved in taking a drag get sore before long. Doing the mouth puff then inhale...I find myself swalloing air...sometimes leading to hickups and gas. Yep, tried taking the bits out of the mouthpiece...all that did was cause it to flood more often, and I tasted lots of raw juice.
Got some CE2s...filled them and liked the way they vape. I figure with a good supply of these I can just juice a handful every few days and be done with it. The sleeves fell apart on me with the clear ones tho'. Easy to mod the sleeves with syringes or tanks. Sometimes they gurgle. OK...got metal ones instead of plastic. Now...they just gurgle sometimes. These aren't cheap either! It's not uncommon to get a package with a dud or two in it. So this ain't perfect either.
Dripping on 510 atty...good deal...but PITA when on the go. Never really tried regular carts for more than a quick test run. From what I can see they don't hold many more drops than just dripping...unless you spend an hour a day obcessively packing the perfect carts.
Haven't tried any bottom feeders or fancy cart feeding mods. If I gotta fill and squeeze a certian bottle all the time...and dismantle the thing to change batteries and stuff.....heck, might as well just drip or load a carto when on the go.
Summary:
It ain't no utopia...all of the options pretty much work...but have different pros and cons.
It just boils down to trying things and choosing what you like.
That is why I prefer 'reviewers' who simply walk you through what is in the box, demonstrate the product, and attempt to describe their perceptions in a non biased way as they go. I.E. I saw one guy walk through a CE2 review. He had bad eye sight and had trouble filling the thing...had to hunt glasses, a light...and so on. Then he vaped it with a variety of battery sizes (since we don't all vape on friggin' car batteries) and described his experience. He didn't gripe about his refill problems, but anyone watching the review could OBVIOUSLY see that it might be an issue for them to fill the things. In the end, he actually gave it a good review, despite his obvious issue with setting it up for use. It was an honest and fair review that shows what you get in the box and how it works. Beyond that...you just have to try it yourself!
I'm not so keen on a review where somone just sit there with a pre-assembled unit waving it around and ranting about how it is a 'FAIL'. Then there's the guys who think everything is supposed to put out enough fog to be a stage prop at a KISS concert...and put the thing on a friggin' car battery, and have a coniption fit when it only lasts an hour. Ummm...will it work on stock equipment?
The T is fine in that it does work. "I" just didn't like the way it draws compared to some other options out there, so for now...I drip and use cartos. I prefer the metal CE2, but when they aren't avilable I'll fill a handfull of regular cartos. Looking forward to trying the Vortex cartos...hopefully they'll work and not fall apart on us.
Personally, I encourage people to try the Tank. Play around with it a week or two. You might like the way it draws and works! IF you do, it's a sweet system. If you don't find your week of using it was worth the 12 dollar investment...and the coil still works...come here to ECF and swap it for some juice or something with someone who loves them
If I had to guess...and someone did a scientific study...I'd be willing to bet that most eGo T problems are based on the draw type and length people are using. If I really suck hard on mine...it floods and doesn't work well. If I don't suck on it hard enough...the wick gets dry, vapor increases, but it has an overpowering TH and slightly burnt flavor. If I get the draw power just right...It takes for ever to pull it all the way into my lungs...by then the battery has timed out, and half of my PV is really hot to the touch.
If you like to draw into your mouth, then inhale...it's perfect!
If you don't care too much about filling your lungs...it's great!
If you like vaping with a lot of nose and sinus involvement...you'll love these things.
So it's simple...if it fits you...great

If it doesn't try something else.