I have completed the game, and returned to acquire 650 of the achievements, so I feel I am qualified to review the game.
I personally enjoyed the game alot. I gave it 8. I found the game, apart from the end of Level 2 very, very fun, and it suits my tastes in game.
The game plays well, with generally good controls, a nice mix of gameplay, and the Tequila Time is a fantastic addition to the 3rd Person Shooter.
Graphics are good, they aren't brilliant, but good enough. The game is a bit short, but if you want to get the Achievements you can easily log an additional 5 hours getting the SP ones.
There are the occassional problems such as long load times, and camera issues, but these are minor annoyances.
The major problem is Multiplayer, the person that decided that when you respawn you have no Tequila Bombs and just pistols was an idiot. Add to that a player getting a full Tequila Bomb Gauge for a kill, and the Rocket launcher or Heavy Machine gun being so over-powered, the person who kills you has a ridiculous advantage of Barrage or Spin attack with the Rocket Launcher the instant you spawn, if you die first, you are doomed to lose the game.
I haven't had much online play as I got the game in January, and finding a match is hard, maybe when it launched online was better with full rooms, but with just 2/3 people in a room it is terrible. Also Tequila Time is very watered down in multiplayer, maybe due to connection limitations.
The game gets 8 from me as a Single Player experience. Taking into account MP it gets a 6. But as I buy games for the SP I will give it an 8 as I don't care that th MP is poor.