The original carto tank (MAP tank) used modified CE2s. Unfortunately, CE2s are inherently prone to wicking issues regarding the wick, itself, being pinched by the silicone insulator. It can be alleviated by fidgeting with it, but that's one of the reasons people shy away from the CE-type cartos to begin with.
As zoiDman said, throw one in your cart if you're there making a purchase, but don't buy this item exclusively. Taste is sunjective, and you may not like it. If you get one, tho, I hope it works well for you!
As an observation... CE2s can be used in standard DCTs by making 2 holes, in any XL SS CE2 carto, yourself.
The Vivi Nova functions almost identical to this carto. Its internals can be rebuilt, too!