I have a couple of questions for people who have played with a lot of the promos.
1. Do you usually include the promos in your games?
Well, I always run with the extra basic/special location cards. More variety & some really interesting effects on them!
As far as other stuff (Conflicts/Events/etc) almost never, as I frequently have new players in the game. Out of 30 plays I've used them only a handful of times, and while I've enjoyed them have never felt like I need them or anything.
2. Are any of them over powered. i.e you wouldn't want to play with them?
Not that I can think of. Out of all expansions/promo's, I'm only tempted to remove the locations referring to ambassadors just to make setup easier ^^. (or avoid having a newbie confused when they have a card referring to them which has been left in).
3. Do you feel like this is a good purchase for someone who is new to the Among the Stars world or would you stick with the base game for quite a while before purchasing?
I got both games together and I think its' fine to run with the extra's from the get-go. On the other hand, you'll get plenty of playability from the base game!
4. Would you rather have this or Ambassadors?
I think Ambassadors. It's just got more stuff. I don't think either is necessarily 'better' than the other though, at least not without deliberately splitting up my stuff to compare ^^.