Although the game is lacking a Covenant campaign, so is therefore too short, the gameplay is fun and easy to control.
There are a few minor issues I have with controlling my units that have caused me some grief. It can be difficult at times to select a single unit or small group of units from a larger army, especially during the heat of a battle. There are basically three ways to do select units within your army. When your army is highlighted, you can use the right trigger to cycle between unit types. The problem with this is that you must then select all the entire group of that unit type; you cannot issue orders to a single unit with this method. You can select one unit by simply hovering the cursor over that unit and pressing A (double clicking A will highlight all units of that type on the screen,) but we all console RTS players know how difficult this can be, especially during a battle. Finally, the player can hold down the A button and a circle will appear to highlight units in an area. You can then move this circle to highlight more units by passing it over the top of them. This ends up causing problems when you want to just command some units, like for example, all your marines, and all of your scorpion tanks, or you want to grab a warthog and 2 marine units out of your army to go off and scout. This is where the issues occur.
The game does everything else fairly well though. The campaign, as short as it was, was fun. The cut scenes were top notch, and don't worry, even though this is a prequel to Halo that still has the Flood in the game, the story was not butchered.
The balance seems pretty up to par, as neither team seems to have a huge advantage. Halo fans will especially enjoy controlling their favorite units in mass groups to fight an epic battle with their mortal enemies. Fully upgraded Spartans are especially fun as they are nearly unstoppable with a well balanced army behind them.