The Petmate Giant cat litter box works wonderfully. I have three of them and can’t imagine being satisfied with any smaller litter boxes. I have three six-month-old sibling kittens who really appreciate the extra depth of litter and the extra surface area. At times they provide support for each other in using the box and help each other cover their business; so the extra size (25.56 x 18.3 x 10.02 inches) is really wonderful.I’ve found that “Fresh Kitty Super Jumbo Litter Box Liners” (43” X 21” X 2.0 mil thick) fit my Petmate Giant cat litter boxes with enough liner left to fold well over the sides. I secure my cat litter box liner with “Coopay 12-inch Large Heavy Duty Rubber Bands” that easily fit around the box and liner and can be tucked up under the lip of the box so they’re up tight, out of sight, and in the groove. I replenish the litter as needed to keep four to five inches of litter in the box, and the cats may puncture the liners; but don’t shred them as other reviewers have reported.I have been trying two different types of litter lately, Arm & Hammer Lightweight Clump & Seal AbsorbX and Arm & Hammer Double Duty Clumping Litter. AbsorbX has the consistency of fine sand. Double Duty has a larger grit. They are each an excellent product, clumping and containing odor equally as well as the other. It is easier to pass the scoop through the AbsorbX litter twice a day; because it is a finer grit, and lighter. Over the past month I have found that there is more dust, more litter kicked out of the box, and more litter tracking with the AbsorbX, and that the cats seem to prefer using the Double Duty as that box now gets as much use as the two AbsorbX boxes combined. Each of my Petmate Giant cat litter boxes uses a little more than one box of either litter to reach a four-inch depth. One box of AbsorbX weighs 15 pounds. One box of Double Duty weighs 40 pounds. My routine for changing them out at the end of the month includes removing the rubber band that I use to secure the liner, pulling the liner’s drawstring tight while it’s still in the litter box; then sliding the box into a contractor bag and tipping it until the liner and any stray litter that may have leaked out through small punctures fall completely into the contractor bag. The weight difference in using the Double Duty will be an additional challenge; but seeing that cats’ preference, having less airborne dust, less litter on the floor, and seeing almost no tracking make that an acceptable tradeoff for me personally.With three kittens; I scoop all three boxes twice a day, and the kittens love having a purrr-fectly fresh powder room in which to answer nature’s call.Update: Now that they three little kittens are turning three years old, I have had to add a fourth litter box. I didn't have another appropriate location in the house for a litter box; so I just turned the one that had been getting the most use sideways and put the new one next to it a few inches away. It has worked out great over the last few months. The cats appreciate the extra freshness that this provides. They are still using the Arm & Hammer Double Duty and still very pleased with it. The boxes are still as good as new, and thankfully the cats only do their business in the boxes.