They spend most of the review going over how the live preview mode works. Live preview is extremely rare in digital SLR's, and as the reviewer notes it is jarring to go back to squinting through a tiny hole when you've become accustomed to framing your shots by holding the camera at arms length.
The reviewer thinks this camera is not for the average joe consumer wanting to take pictures of the wife & kids. This follows from the complex dance between the two live preview modes, and a manual shutter that is in the eyepiece which can allow light into the camera during exposure throwing off the exposure calculation.
The reviewer describes the live preview mode as being very jarring when working with quickly moving subjects. The advantage to squinting through a tiny hole is that you're directly seeing the light coming through the lens, no lag induced by processing time. The live preview mode, on the other hand, shows a delayed view of reality because of the processing time required to get the image into the LCD. The lag causes strange effects during taking pictures.
The view through the optical viewfinder (squinting through the tiny hole) is dim, because it's generated through partially silvered mirrors.
This is an SLR with a rare feature, live preview. The vast majority of SLR's do not offer live preview on the rear LCD, and instead you have to squint through a tiny hole to look at the image on the focusing screen. How 70's of them. This is actually a throwback to traditional SLR cameras where a mirror sits behind the lens, the mirror directs the light up to a focusing screen, and the user looks at the focusing screen through a prism.
