Since our pup doesn't mind getting into the harness and is READY to go once its on, it must be comfortable, even with a load! The pouches are much more spacious than we expected, and we're glad we didn't go with a larger pack. The handle could be a little easier to grab and we wish it was easier to keep the load a little higher on his shoulders (no matter how much we tighten the front, the harness likes to slide back, regarless of leash pressure), but minor minor things aside, we love this pack!