The Good: Great graphics, large variety of enemies, weapons, going back to previous RE games is a great trip down memory lane
The Bad: Even though there is a variety the core game play doesn't change much, a bit too difficult in spots, way too short
I was really excited about this game because it was the first of it's kind, for the Wii, to utilize the Zapper (and any other 3rd party light gun attachments) to make you feel like you're really shooting things. While we can't use the Zapper for RE4 this sure does work. While the game is on rails and it moves around for you it makes a great cinematic experience and the difficulty stays about the same throughout but can sometimes get a bit too tough in spots.
The game has you playing through important sections of previous RE games and it's a great blast to the past. For fans of the series it's wonderful to go back and have certain scenes trigger memories. While the newer RE games aren't present the others are and you can even play sections of the game that you couldn't in the original such as playing as Albert Wesker in RE1. You can upgrade your weapons, shoot objects in the game to find hidden files, and you are rated after each mission. There are even some sequences where you have to press buttons during key sequences like in RE4. The boss fights are really fun because each one is different and they all have their own way of having to be beat. The controls are pretty simple and easy (especially on the Zapper).
There are plenty of enemy types, weapons and so forth to use. I find that REUC is one of the best arcade style games on the Wii and shouldn't be passed up. The game is short mind you and isn't worth nearly $50 but as soon as the price drops it'll be a steal.