The working way of shadowsocks is to establish a tunnel between your client and destination server using a proxy VPS server, usually I choose to setup a VPS abroad as the proxy rather than using business services which could be interfered or blocked. "Fine" means it can meet most of the requirements for me to using internet, including visiting YouTube or syncing codes or downloading data, the network threshold is actually limited by the speed between you and your proxy VPS in most case.

For more information, vist https://github.com/shadowsocks