Is a Zero Gravity Lift Chair Comfortable for Naps?

Is a zero-gravity lift chair like the fabulous MacZcliner comfortable for naps? 

That's one of my favorite ways to use the MacZcliner. Zero-gravity, heat, massage, kick back, close your eyes, rest, recover, and rejuvenate. You'll notice my feet are above my heart, great for circulation, great for eliminating swelling in feet and ankles.

This is a zero-gravity position like NASA uses with the astronauts. When you're ready for liftoff, just put your head back, and you'll have a smooth liftoff and a smooth landing in this fabulous MacZcliner designed for a great night's sleep, for you, for an afternoon nap, or all night long.