Ah, Crisis Core... the prequel to the bestselling and most famous Final Fantasy game ever. I finally bought it the other day, and I must say, I'm mostly pretty damn impressed with it.
For starters, let's talk about the graphics. The FMVs are top-notch, and the 'normal' graphics, while not perfect, are more than acceptable in my opinion. For an example of the lower limit of what I call acceptable, look at the 'normal' graphics of, say, Kingdom Hearts 358/2 Days on Nintendo DS. Obviously, it's not fair to compare games on two different platforms, but this is only a rough comparison. So, overall, I'd rate Crisis Core's graphics as "great".