I have had a number of problems with the clearomizers so I may as well just list them out
Pro's:
Fantastic taste and vapor (for the most part, see below)
Only carto where you can see how much juice is in there
Very very easy to clean (I use needle nose pliers to get the silicone "fill cap" off, just pinch and gently pull)
Great concept.
Cons:
Fragile as hell!! They come off of their base if you're not VERY careful, also the wires can easily come loose from their solder connections and the cup assembly (wick, cup and all of the heatshrink below tend to come loose from the center tube)
The 2.4-.6ohm REGULAR sized v4's had an odd piece of heatshrink on them that MADE EVERYTHING TASTE LIKE PLASTIC!!!
The XL's leak/flood if stored sideways or battery side up. I may be able to fix this at some point and Stormy's Storm tank uses the cup of the extra rubber tips to cover the ceramic cup. Seems good in theory.
They NEED to be dry burned after about 3ml is pumped through or the coil will be too gunked up to work properly.
What I've found so far is that in the regular size ce2's, the extra piece of heatshrink can be sliced off and the plastic taste goes away. Also if you use one of the extra pieces in a regular carto (some cartos have a 2nd cap under the main hard/softcap) as a buffer between the fill cap and the mouthpiece cap, they're less likely to leak.
I have ONE regular clearo that works like a charm and tastes amazing. Two broke at the wires, One wick fell to pieces, and one works, but tastes like plastic (very light taste, but noticeable).
I have THREE working XL's but they all flood very very easily.
Great concept, best cartos that you can use with a thicker VG liquid, just full of minor flaws that don't work well with people like me that just want to fill it, put it in my ego case, and go. That's it. End rant.