at 1st u gotta play with an tweak the plant and u have to figure out a good easy way of getting the top on an aligned, but once u figure out a way that works for u, its easy! I think I love it more than my kitties do. 1 of them finally used it after 24 hrs of checkin it out, Im sooooo excited and hopeful that my other 2 will follow their sister soon! Im hoping to add another an completely get rid of their old ugly smelly litter boxes, totally worth every penny! Oh and the other great part, they sleep in my rm an wake me up often scratching on the walls around their litter box...with this box, u hardly hear the scratching...ahhhh bring on the sleep!