This Sharp projector is designed for ceiling mounting (or placement on a table top). There is no way to place it on a rear shelf, due to lack of lens shift, and a relatively short throw zoom lens, with very little (1.15:1) manual zoom lens. With a placement range of 10.4 to 12 feet for a 100" diagonal screen, it is likely to be mounted just in front of your seating.
All considered, the XV-Z15000 is the kind of projector that once properly installed, will be thoroughly enjoyed by its owner. Just keep in mind that if you are a highly critical enthusiast, or even more demanding - a purist, this projector probably isn't your cup of tea. By the same token, I'd have to say it's an excellent starter 1080p projector. I believe many that buy it as their first projector, will really love it, probably get hooked, and be in the market for a more expensive/better projector down the road. In other words, its picture quality is more than good enough to hook people, and make them want to raise their standards. Not because it is weak, but because after watching the XV-Z15000, and enjoying it, the question becomes something like: Wow, this is great - I wonder how much better the viewing experience will be if I upgrade in a couple of years to a much better home theater projector.