I can comfortably say 3 things:
1. I would recommend this as a first system for someone looking to get off analogs.
2. They are much easier to fill than the E2's, and a lot less hassle than the standard the 510 atty/carts I started on.
3. These have been far more forgiving of my wifes mishandling than the E2's.
Beyond that, I'm only 9 tanks in myself on a fairly tough juice, I don't have enough time on these to form a solid opinion. It's held up to it better than my E2's but I'd like to try it on a cleaner juice as well.
As far as cleaning on the E2's goes I do a Vodka soak followed by a dry burn. For coils that are really crusted I'll let them soak for a couple of days. After the dry burn there's usually ash around the coi that brushes off easily with a little dental brush, the kind used to clean braces. To avoid hijacking Cozzicon's thread I would recommend spending some time on the
Bad's CE2 thread (very long but a ton of great information) or on
Storminytes Thread.