I had a great time running this game for 2 players, going on a Science Adventure. The random tables and the art combined to create a unique atmosphere, and glancing at options not rolled and wondering how different the journey would have been was fun.

To finish in 2 sessions, we did have to rush through some of the layers,  only doing a single scene in them, which in turn meant we didn't get to interact with some of the mechanics all that much. I was looking forward to seeing how Stress would be used, but the PCs kept clearing it on descent. I would suggest taking out some layers if you're pressed for time instead of doing what we did.