I've played on a server, it's terrible.
Apart from the part that the controls are stupid and I couldn't figure out how to build, the way the client itself works is just terrible, and one thing I found very ironic, is that there is no restriction on what you can and what you cannot blow up, so I was blowing stuff up, people were bitching at me for doing so.
No, let me just ask you one thing, have YOU tried Blockland?