|Choose your identity|
The first, and most obvious, pro for Saboteur is the reason I bought the game - it can support 3-10 players. And, though I haven't played it with all of the different numbers, I think that it would play fairly similarly with any number of these players. Yes, you will have less control and more downtime with more players, but since you are also attempting to figure out who the Saboteurs are (and convince the other players that you aren't one!) I think that you will still be equally engaged throughout even the bigger games.
My biggest con for Saboteur is that your "secret" identity really isn't very secret - at least not for long. Either you are actively helping the other team, or there is a good chance that they will figure you out. There are some exceptions for this - like if you actually don't have any good cards you can play, so you start discarding. Overall, though, it seems like if will be figured out pretty quickly. This might not be the case as much in a really large game (one person might be able to evade your notice until late in the game), but in order to do that, they would probably be doing something helpful - which hinders their team's goal.
Overall, I give Saboteur a 6.5/10. Everything about it (except for maybe the secrecy of your "secret" identity) works, but nothing about it really pulls me in and makes me want to play again. If I want to deceive my fellow players, I'd rather play Battlestar Galactica, The Resistance, or Shadows Over Camelot.