into this scenario should probably not be allowed to write scenarios in the future. Pregens have no way of dealing with them. This is an introduction for new players. TPKing them is not the way to get them interested in the system. The pregens likewise have few options for dealing with the final encounter. The GM that ran the game for me at GenCon just basically handwaived half of the last encounter. Not a good start at all.
I played this as a level 3 envoy, with a second envoy, an exocortex mechanic and a mystic. The last fight lasted an hour and 15 minutes, during which time the PCs did approximately 20 damage to the boss. Nobody could hit him, two of us were knocked unconscious by lightning bolt spam, and the others just danced around waiting for the GMs bots to kill the boss. Not a very fun scenario to say the least. Afterwards, the GM told me the scenario put the exact same boss in both tiers. Just poorly designed in my opinion.
I played on low tier with a level 3 operative, a level 4 technomancer, myself a level 5 solarian, and pregen Keskodai. I do not want to spoil this for people who like this sort of thing but I do not like this sort of thing. There's no way a non-GM would infer the rules of the main gimmick of the scenario and once you do know the rules there is no challenge. In my opinion, a scenario, if it is based on a gimmick, should give the players a chance to learn the gimmick before killing them, which is not the case here.
Review in spoilers.
It is unclear to me why anyone would ever want to play this scenario. There is no explanation as to the rules of the gimmick creature. There is no way to heal stamina for most of the scenario. The scenario punishes you in both credits and fame for not taking the time to carefully search the facility while the gimmick creature chases you. You will earn less credits and fame by playing this scenario and take a huge gamble that your character will die. If you enjoy throwing months of your life away watching a creature, that no one can damage, one-shot your character, this is the scenario for you. If you enjoy combat or roleplay, I would suggest you choose another scenario.
I really enjoyed about 90% of this adventure. The starship combat was good, I liked the hobgoblin background stuff, the doors making you sick was neat. However, the last boss is really difficult for 4 level 1 one characters, especially if they do not have fire or acid damage. Might be nice if the adventure telegraphed in some way that those damage types would be necessary for the exploration of the ruins.