I see; I use hosted version (some here https://www.seafile.com/en/partner/ -- they should advertise it better imo). Had no problems from the beginning (there are clients for Linux/Win/etc. as well).

I like the idea of self-hosting a lot, but I also think it's fine to have hosted services of OSS (I think you need to be technically oriented to make it work easily and reliably, which isn't everyone).