Review data is sparse, but the sentiment is clearly positive. There are no user reviews here, and almost all founder reviews include no written details, so the strongest concrete takeaway is narrow: Fly.io is seen as easy to deploy on. The only specific comment comes from the makers of Seagull, who say it made launching their Golang API trivial. Beyond that, reviewers signal approval more than reasons, with no written complaints or tradeoff notes in the provided feedback.