Terrible litter boxes! WAY too low and urine seeps under the box (sifting trays don't seal together). We had an awful mess on our hands. The concept is partially good, but it needs to be WAY higher and also seal together better. Even following their instructions to a T did not help. Also, I sent them an email on August 22 and it is August 25 and I have not heard back.
Littler is tracked everywhere! Terrible.
Bottom Line: No, I would not recommend this to a friend