I've heard a lot of good things about IGOs too. Honestly, what sold me on the Kraken, other than the fact that I love the way it looks, is the airflow control and the ease with which it can be adjusted. So many RBAs either don't have air flow control, or adjusting it is a pain (unscrew this to loosen that to spin this, then tighten it all back down and hope it's where you want it, etc). With the Kraken and its clones, the air flow control is on the top cap, so I don't have to touch anything else to adjust it, and I don't have to worry about
juice leaking
through the air holes when I fill it (because it's not a bottom coil.)
In the end, I fully expect to own an Igo of some description, an AGA of some description, a russian/
kayfun of some description, and a Kracken or two of some description, so I'm not saying any of the above are bad... but the above, plus plenty of room to work on the deck, is why I went with a chi-krack *first*. Others' needs and preferences may be entirely different.