Do not go into this game expecting Gears of War 4 or you will be disappointed. The game is all fire fights, there are no moments like fighting the Brumak or Corpsers from other games.
The story is pretty short but unlike the other Gears game they actually tried to put plot into this one. Baird is a terrible front line character but it is pretty interesting seeing what got him to where he is.
The star rating system and declassified missions add a cool element to the game that I've thoroughly enjoyed. When you do a run through on insane prepare to reload alot, some of the situations are basically impossible to run through on the first try with insane difficulty and the declassified missions.
The new(old? haha prequel joke) weapons are pretty cool and I hope some of them will make their way into future Gears installments.
The multiplayer is pretty much copy/paste of other Gears but why fix it if it isn't broken. OverRun mode is AWESOME even for players who normally don't enjoy PvP. The lack of Horde mode is a terrible atrocity.