First off, let me say that Nexiuz is *infinitely* superior to its main competition in the multiplayer freeware FPS field, Alien Arena. There's just no comparison in terms of speed, excitement, weapons, and gameplay. It's also great to actually have someone to play against! The single player campaign mode was especially good, as was the bot AI. On a more trivial level, I loved how compact the map files are and how fast they downloaded, as well as the handy 35 map pack. Nexuiz blows away AA in this area too, as the latter has no compilation of maps and the maps/textures/models take forever to download with the in-game interface.
The only suggestion I have is better regulation of Beginner servers. There are expert players lurking those servers who toasted me regularly. Very frustrating.
Still, awesome job to the dev team, and all of it for free??? I have to pinch myself now and then to make sure this is real.