I thought I'd bump this thread since new forum members may not have seen it, and fruit is ripening. (Thanks, Maverick, for the idea!)
It has worked very well for me also, although in my hot climate it's most effective on fruit that is at least partially shaded. We had very few apricots & peaches this year due to a late frost, and then the birds ate every single one that wasn't protected in these little boxes. They also worked last year for figs. The best boxes snap securely at the corners, and have a sizable gap between the lid and box, which allows you to close it around a branch.