The ability to extend capacity with the tank extension and or bubble glass is a nice option. The quick disconnect of the rba deck is also a nice and new feature to see. I love that it can use the Horizon Falcon coils as well.
The rba post less deck is easy to build and wick too. Up to dual 3.5mm ID coils will fit or you could use a large single coil. Basically it'll fit dang near whatever you'd like.
The side airflow is smooth but I found using the bottom airflow is a bit pitchy and can have a whistle to it. Fortunately using the bottom airflow restrictor insert does eliminate whistle while also not substantially restricting the airflow.
My main con is mainly concerning anesthetics that are also more prevent on the SS finish. There is many different finishes and colors (matte, machined, knurled, heat-treated-rainbow) on the stainless version in addition to some over branding and text on the tank. In rba mode it's a very tall tank.