It's designed to deliver that "smoky" or "airy" jazz ballad tone, and it totally does. My usual mouthpiece is a Bach 1C, and to me the comfort is very similar. I don't need any time to adjust to it after playing with my regular one.
Responds pretty good in all registers, flexibility seems normal, it doesn't require more or less air. Less air you use, the more "airy" is the tone.