Was not a fan of this film. There are some decent moments (the end credit scene is interesting) but overall I found the story to be predictable. The extended telescope scenes aren't nearly as effective as the comparable scenes in Rear Window are. Also actor Craig Wasson sort of bugged me in the lead roll.
Over all, I think the predictability of the story is what kills the film. As soon as things get going (it takes a while to get to the body double aspect of the film) I figured everything out almost immediately. Really the best thing about the film is the crazy house where the telescope is located. It is one serious love nest.