It's the only game worth playing on the Move. Hours of fun, but with some flaws.
My first impression before buying this game was that it was a great concept to bring boxing to the Move. I played boxing for Wii, which I found somewhat lacking. I must admit the 5.0 review from Gamespot discouraged me, but there were a lot of positive player reviews here and on Amazon.
Player configuration and attributes/skills:
Like many of today's games, you get to set up your player's looks, clothes, etc. You have some basic body types as well as clothing (shoes, pants, shirts, tatoos) as well as some items that can help you (studded gloves for increased damage and padded gloves for absorbing some impact of a punch). You also get to improve your player's attributes (strength/speed/stamina/etc) as you train and level up. You can also heal your player between fights which costs money.
Training:
The training costs money, but you earn plenty of it through career mode by winning fights. The amount of money you spend on training is not that much, but it does take some time to significantly improve your stats. This is required to play online, unless you want to get your butt kicked. It will also make it easier to win fights in Career mode.
Career Mode:
You have different levels, each with 10 fighters to beat. The last one is usually the most difficult (boss) and as you win more fights, you improve your rank/reputation. You can bet on each fight to increase your earnings. Beating an opponent will earn you one star whereas "nailing" the fight (usually this is getting low damage or a high hit percentage, each round has different criteria) will get you 2 stars. So far, it has taken me about 3-4 hours and I beat the first 3 levels and some players in other stages (there are 8 unlocked).
Online mode:
Online mode has an "Unranked" and "Ranked" matches. The only difference is that the ranraked matches do no affect your reputation/rank. Also, all the online trophies can only be earned in "Ranked" matches. You will need to build up your stats prior to playing ranked matches if you want to win.
Multiplayer (split screen):
I can not test this as it requires 4 move controllers and I only have 2. I think $100 is a bit steep to play this game split-screen, so I will just stick with online multiplayer.
Controls/Calibration:
Perhaps the most important here is the Move controls. You will need 2 motion controllers to play this game. I also use a dualshock controller to navigate most menus although most of them can be done with the motion controller. Before each round, you go through a quick calibration which takes about 10 seconds. A few times, I lost calibration mid-game because I was moving too much and the camera lost track. You can also recalibrate mid-game by getting in fighting stance and pressing the "O" buttons. The first few opponents can be beating by swinging like a mad-man, but later levels, you will have to incorporate some strategies and some "dirty" moves. I also noticed some glitches where these moves can't be done consistently. Maybe I'm not doing the move exactly right, but I think it's more likely a control or tracking issue. This is the biggest down-side of the game.
Conclusion:
So far, I've played this game about 10-15 hours between career mode, training, and online. This is probably the most fun game on the Move right now. I get a sweat from playing 20-30 minutes, so it's a good workout too. According to the tracking, I burned 2000 calories, not including training mode. Be sure to not push yourself by over-extending your arms during punches , keeping proper posture/stance, and not overdoing it by playing all day. I had a day off work where I played for about 5 hours and it took me 3-4 days for my shoulders and back to recover. My only complaint is that the controls are flaky at times and that the game requires 4 move controller to play 2-player split-screen, which is too expensive for me. Very fun game overall and I would highly recommend it for any Move owner.