I think their product is sound, they build essentially a backend as a service platform on open-source software. That doesn't make it easy to run at scale, so you probably wanna use their paid offering unless you plan to hire a lot of staff to maintain it, but it is possible and they support small scale dev envs
Have you thought about possibly hiring a junior engineer to make the transition possible? I don't know what your use case but creating a solution that fits your needs would be worth it IMO. You're already spending a years worth of dev salary which can get you plenty of good talent around the world with.
