From the comments, I saw many people criticizing its usefulness and compare it with normal airplane. I don’t think this is good. For every attempt to create we should give our deep respect. When we create, we create for fun. Always thinking about the usefulness will only limit our creativity and lead us further away from what we truly love.
I wish someday i can sit at the back of such a bird and see what the bird sees in the sky. I believe with the trend towards higher energy efficiency, and efforts from those admirable people, that day won’t be too far away.