There's a lot to say about this game, it showed up out of nowhere, I played the demo and was extremely impressed and immediately sold. It's unlike anything I've ever personally played, This is probably the only review on the whole page from someone who never played Commandos or Desperados, though I'll probably try them after playing this.

• Gorgeous graphics and art design. Every level looks beautiful, the animations are great, Being an isometric game, it looks amazing while not being very taxing at all and runs flawlessly.
  
• Everything with regards to sound is great. Weapon sounds are awesome, the music is great and fits the atmosphere of the game, and the Japanese voice acting is phenomenal. Can't speak for the English VA.
  
• Gameplay is interesting and fun, and there's tons of depth. Levels are designed in a very open ended manner, with many different approaches available depending on your playstyle, as well as 9 optional challenges for each mission.
  
• Story is really cool, and the characters are great, both in gameplay and in the story. They have tons of personality, and each one has their own unique abilities and are useful in different ways.
  
• A lot of replayability, with 9 challenges per mission, which are impossible to get in a single playthrough, and multiple paths through levels.

• I'd have liked to see a few more abilities in the game to add some variety, as each character essentially has an attack, some form of distraction, and some sort of indirect attack method or AOE attack. I'd have liked to see the more mobile characters possibly have some sort of escape ability, like a smoke bomb or something of that nature, or more varied non-lethal options.
  
• The games Shadow Mode mechanic could use a way to set a timed stagger to when characters perform their actions, it would make it smoother and more flexible.

• The game is hard. Normal difficulty is a serious challenge, and you'll likely quick save and reload many, many times on a first playthrough. I'm sort of slow and bad, so you may have a bit of an easier time, or a harder one.
  
• The optional challenges are even harder, often to the point of being video game masochist only territory. I personally love that they are willing to throw out that extra challenge for people, but if you're a completionist, prepare to pull your hair out on some of these.
  
• Despite being a reasonably long, sort of party based game, there are no RPG mechanics or character skill progression elements to speak of. You do get new characters over the first few missions, and get a new item as well, but that's it, there's no real upgrades or progression beyond that. Some people look for that in any game they play, and it wouldn't necessarily be unsuitable here, each level is designed with a particular set of abilities in mind, and as you progress through the game you learn new applications of each characters abilities and ways they can work together. This is going to largely be down to preference.

I'm only a little over halfway through the game, but am predicting I'll finish in between 25 and 30 hours of play time, though that's likely slower than average. I definitely feel that it's been worth the price of admission and is looking to be one of my favorite games in a long time. I'll likely update this if my thoughts are different when I complete the game, but as of now I'd definitely recommend this one. It's a lot of content for the price, and a lot of replayability, especially if you want to try for all the challenges. If you're unsure, try the demo. It's free and contains the entire first level as well as a ten minute preview of the second, and your save carries over, so you don't have to replay it. Definitely give it a shot.