Who are the people behind fly? It looks to me like the first thing I've seen in awhile that actually might be "a better heroku". Anybody out there using it?

Who are the people behind fly? It looks to me like the first thing I've seen in awhile that actually might be "a better heroku". Anybody out there using it? Anybody who was happy with heroku for mostly everything other than price that migrated to fly and remained happy?