I ran Icarus and it's a perfect Mothership one-shot!
If you REALLY, REALLY just have 2-3 hours to play (which I did) I would rank it higher than most of the standard recommended MoSh one-shot pamphlets. Nothing against them at all! but a more investigative focus can threaten to spiral into multiple sessions, whereas Icarus' GO GO GO vibe gets to the meat quickly.