Here's a bit from the Destructoid review:

Other 3DS-specific features include some occasional gyroscope controls that be difficult t' acclimate t', 'n the ability t' make yer own camouflage by taking photographs a real objects with the 3DS camera. Neither feature stuck out as worthwhile t' me, especially the camouflage thing, which, if abused, could completely void the value a collecting in-game camo. Probably the least flashy but most worthwhile addition t' the game be the crouch walk from Metal Gear Solid 4. It really helps t' keep the game flowing toward the player at a brisk pace. CQC has also been streamlined, making hand-t'-hand combat much more breezy. that be what people like about stabbing lads in the neck, right? The "breezy factor"?

There be a few other little nods t' Nintendo in the game, like Yoshi dolls that be hidden in nearly every stage, 'n the occasional issue a Nintendo Power lying around in Snake Eater 3D's more upscale locations. These touches be cute, but they don't quite offset the amount a content that didn't make the jump from the PS2 original t' this handheld port.

Check out the source link for the full review.

Source: Destructoid