The game is good. The controls are the same as RE4 when you change the controls in settings.
The AI is very bad which can be a problem when it just picks up useless items laying about. I find sometimes when your taking a shot it gets in the line of sights or stands behind you when shooting wasting ammo. Only useful for carrying extra items. At least if you have a friend you can switch out the AI for your friend to play along. Or someone online.
It has its own storyline but does refer to RE4 on some parts.
There aren't any zombies in the game. Zombies are quite boring now in the series.