The viewfinder image is indeed magnified, and I feel more comfortable now making wider angle compositions and letting subjects appear smaller in the frame.
I am not experiencing the higher relief as expected. Instead, I find that I have to crowd closer to the (extended) viewfinder to eliminate the vignetting. This is probably not an issue on the entry level models with smaller viewfinders (for which this magnefier was surely intended). Still, if I'm crowded closer to the magnified image, I'm still marginally further away from the LCD, and I have noticed that the LCD stays significantly cleaner.
Eye-start works intermittently on the a700 body. The varied reports are probably due to differences in usage and accessories. The eye-start sensors can detect my proximity if my cheek is against the main LCD, but that defeats the purpose. I do not use a screen protector, so I cannot report if one would alter your experience, but my guess is that it would. I currently have eye-start turned off, and that takes some getting used-to.
One unexpected complication with the FDA-ME1AM magnifying eyepiece is that I find it harder to see which AF point is chosen within the viewfinder. The center point is most visible, followed by the outermost 4 at NSEW locations, but the six smaller AF point markings are all but invisible against darker scenes, I find that I'm using the main LCD to change to one of these or to get the AF point back to center.
Finally, despite the complications, I am leaving the magnifier on the camera. It makes the viewfinder larger, period, and for that I love it. I would urge every alpha user to pick up an FDA-ME1AM if only just to see if it suits you. It is not expensive, and it has breathed new life into my camera and the photographic experience.

