Bought a Aero a week ago and really like it, much improved airflow, for those that thought KTPs were airy, you can close down the flow with the ring, finding your perfect sweet spot, I'm ordering replacement bases for my 1s and 2s. Compared to the Nautilus, I'm on the fence, as it also has a control ring, but only gives you four different options, and the Aero base is infinite.