Comfy, absolutely.

Fast, not so much. (IIRC, a fast trike loses about 1-1.5 mph over a good road bike, a slow trike loses another 1-2 mph. And, we won't talk about hills (well, OK, it depends on the trike, and depends on how you ride - some riders can actually get the lighter trikes (that means they're below 35 lbs, instead of approaching or above 40) up a hill faster than they can a road bike, due to how you can apply torque to the pedals on a 'bent. Certainly not machines for weight weenies.) But, I don't care.