[CSMastermind]

I'd recommend avoiding it for now. It still feels unfinsished and poorly thought out. I have many criticisms of their decisions with regards to game design, but even if you like the direction they went in, the UI is rough, and the actual experience of playing isn't fun.

They're releasing a big update in the spring where they reworked the core gameplay mechanic because so many people disliked it. If nothing else I'd wait until that comes out.