Bests & Worsts Reviews from Amazon

Summary- Poor QC combined with improper use caused many negative reviews here, but the real issue is that it doesn't 100% eliminate the need to hand-sift litter, possibly because it's a little small. And if you have to scoop at all, you might as well scoop the whole thing. Try a different product. 3 stars, minus 1 for lazy quality control. First things first, this product does not require any serious modification, with one fairly large caveat* This product is clearly mass-produced, which is fine, but the quality control is lax. If yours doesn't fit together right, either give it the extra push (or quick shave with a scissors blade, box cutter, et cetera) it needs to fit together, or return it. For something that doesn't see good quality control, from a design standpoint everything should fit like a glove. When I assembled mine, I immediately noticed that the folding screen did not pop into its groove flush on both sides because it was not cleanly cut. Even without shaving, all it took was a little extra pressure and focus on the offending side. Bam, "screen falls out/doesn't sift litter" resolved. That internal edge also would have prevented the top lid from seating flush over the upper lip on the base, the main method of sealing in litter when the box is rolled. Boom, "clips don't hold lid on / litter spills or leaks / poop falls on floor" resolved. But at the end of the day, do you want something that has to be carefully put together, while monitoring for product-defeating defects? No, this thing is four parts, it should snap together on the first try and work flawlessly every time. But thanks to manufacturing defects like poorly cut plastic, that's not the case. So one star off the top since nobody wants a litter box they have to baby-sit. As for its actual sifting ability... sort of. Our cats are MENSA-certified geniuses. When your genius urinates on the filtering grate or the back wall of the box, it will stick, and you'll still have to scrape it out. Nothing you can do about that. And if you have to dig around with a scoop anyway, ask yourself how much time, effort, and ick you're really saving yourself. Which brings me to my last concern. It's a bit small in there. Our cats are a healthy but sizeable 12 pounds. With a usable interior area of 12"x14" at the widest, larger cats have just about exactly enough room to do their business and not an inch more... which increases the likelihood of urine on a surface where it'll stick and not roll into the tray. For best results, wait for clumping before rolling. But at best, you'll still scoop.