They had many issues with leaking, wicking and overall bad taste. At least some vendors have stopped selling them until they get the issues corrected. There are some out there though who have had no issues. If you're one of them that's great but I wouldn't advise buying anymore of the current run...if any are still for sale until they get things worked out.
It's a growing process, same thing happened with the CE2's, the first few revisions of those were horrible. They seem to have gotten on the right track recently and probably will with the Giantomizer eventually.