The thing I love about this map is the sheer quality of textures.
Green Lava, Muddy waterfalls into clean pools, "ice", "rocks" etc....
The lighting isn't terrible, neither is the placement of the healer (yes I am trying to fill a rather large review box)

I also LOVE the features in this map:

The waterfall with instant death trap pool at its base. Any Stingers, Guardians, Stalkers or Mechs that go into the apparently shallow pool are stuck for the rest of time.
The laser that warms up the surrounding area (quality) and of course the lifts.
The user friendly (there goes my arm) instagib, entity fall through design and complete lack of protection make them my favourite feature in any gloom map.
The quality ice tunnel, the laser, the completely pointless room underground with no possible entrance except for the laser mine thing.
The vents, how original, and a whole 2 rooms with entrances to the vents.

This map is not bad, until you attempt to play gloom on it. The only spider class that stands a chance is the wraith, and even then only if its not "cold".