Most reviews go over desktop tools and default tools, but such reviews are not very useful for describing NixOS, as the power of NixOS lies elsewhere. People who choose NixOS must be willing to do their own partitioning, and you will not be doing them any favours by telling them the default desktop manager can suit their needs.
With that said, if you can follow the NixOS manual, you will be fine. You can choose a default desktop environment if you want, but make sure you are comfortable with the command line and can edit a text file for configuration tasks.