I recently heard about Mothership from some YouTubers and decided to run a one-shot for a couple of guys in my Pathfinder 2e group. I was really impressed by the way that a more rules-light system naturally encourages more player engagement and creativity. We will probably end up playing a lot more of it in the future.
I ran “The Haunting of Ypsilon 14”. It’s a solid adventure, though the reason for the players to stay and help is a bit thin. Once the players realized that something spooky was going on, they all were like “why wouldn’t we just leave?” I came up with something plausible enough for them to justify continuing to play, but they told me afterward that aspect was a bit immersion breaking. The actual scenario though was very effective at spooking them.
I played online using this micro vtt, since my gaming group is not physically nearby. I just used pdfs for the rules and the module itself. The one-page adventure format was surprisingly easy to run.