I agree with ryoko's review. The texturing is a bit bland, but otherwise decent--nice attention to detail. Differential shading and lighting are generally excellent.
Flow is mostly good but then there are weird things like deep water, lava pits, water cannons, dead-end rooms, peculiar shaped elevators, etc.
The 21 maps all have a similar feel, so what you could do is thin them out a little, get rid of some of the not-as-good-looking ones, fix up little flow annoyances, add some weapons, and this would be a solid pack.
12 Infinity Net Maps
?Nothing showed off scale, beyond the Nerve Compression hanging in the edge of Danger. But he could not worry about the Nerve-box. That always came through cranching."