I am a Kinesis Advantage user with ten years' experience, and agree with this.

I did buy a pre-made Atreus kit and have been playing with it. For a portable/compact solution, it is a reasonable but not full substitute for a Kinesis (basically on the go).

I think the default layer-switching choices are still uncomfortable for me, and I am looking for a better layout to stabilize.

My main interest in the Atreus is hobby-oriented, to learn how to use Plover with it: http://plover.stenoknight.com/