Extremely comfortable for both me and my pup. As a petite woman, I appreciate how adjustable the pack is. My 15 lb. shih tzu loves it too. I have a further range than the lazy little guy, so when he gets tired, he happily gets into the pack and we can both keep on truckin'. It's also funny that as we walk through the busy tourist town we live in, I hear people say, "there's a dog in a bag!" as we pass by. He looks so cute peeking out of the hole. Highly recommend!