Larger than 7th Chamber, with lava that seems to be just for show... but it looks nice. Update tweaks lighting, and adds a couple of nice features.
A very subtle use of 5D (it's pretty easy to miss that you're actually in it). A small central pit with tiered hallways around it... the good stuff's pretty exposed, so be careful.
Kinda reminds me of Carnage Palace Deeluxe, only with more to do. A bit dark, but a pretty fun little level.