Nice box.  Took off one star because the top and bottom are plywood, not solid pine like the sides.  Also the front latch was screwed on crooked.  Otherwise the top and bottom align well, and the hinges are good.  It does need sanding with 220 paper before painting or staining.  If you stain, use a pre-stain wood conditioner (such as minwax Pre-Stain) so that the soft pine does not take stain unevenly and look blotchy.  A wood conditioner is amazing when staining soft woods, makes them come out looking like a hardwood.  Just follow the directions on the can.