Really great coverage- the farther away from the projection surface the bigger the coverage.  Love the colors and the twinkling light effect.  We placed this behind a stained glass nativity through a big tree; the effect is so pretty.  A twinkling, star effect, love it. 
There is an option for mounting on a solid surface and comes with the necessary screws to do so. The addition of a cable lock to prevent theft is nice also. Very happy wwith this purchase and hope it holds up to the elements over time.