I like to see them IN the review, where it's appropriate. I don't want to scan through 8 photos at the end to try to find the one having to do with how well the toy bends. Where that particular bit of information is included, that's where I like the photo to be so that it's easy to relate it to the information.
I also like to see them in the review, ideally sitting in the same screen-space as a sentence talking about it. When pics are at the end, I tend to jump back and forth to see what they are talking about...which obviously is not ideal!