One word. Meh.
Gameplay: 8/10.
It's the same Pokemon gameplay we've all grown to love, but it needs more... a certain twist, like a free-roaming environment like the ones in the GBA games. It's what we're used to, but introducing something new could make the franchise better.
Graphics: 10/10
At first glance it may look exactly like Colosseum, but the graphics are actually sharper and more detailed, and every attack has gotten a makeover. It's easy on the eyes, really.
Sound: 9/10
The new battle music is actually not that appealing, and the location music is same as always. Repetitive. I'm actually sad that I can't fight Miror B. anymore because his music is a lot better than the normal battle music, in my opinion. Everything else can get annoying pretty quickly.
Value: 8/10
This game isn't exactly worth the 50 bucks that it is. I say, rent it first and find out what you think before buying it.
My rating: 8/10.
Total score: 8.4 Great, but not that great.