The mod runs very smooth on performance and netcode side, also the way how they implemented the space is nice, to get around the "small" hammer grid (which is about a half kilometer, way too small for space ship action), they made the space and the mothership interior 2 different areas, while the ship interior is normal hl2 scale, the space is 1:40 scale, so it kinda works like a source 3d skybox, just a lot more advanced, you can seamlessly go from ship interior to space and otherwise.
For more detailed informations about the mod and to download it, go to http://www.eternal-silence.net/ or directly download it from my site.
Oh, and i have a test server running for this mod, just search for an yas server if you want to join, im not sure if i keep this server running, depends on how much cpu this server takes.
And here are some of the screenshots i took:





