When I first saw the Crystal cat litter I thought there is no way these crystals are are going to absorb cat urine and hold in the smell. I was definitely wrong! Normally after we come back from a camping trip the first thing you smell when you walk in the door is the litter box ugh. Not this time not at all! It was like we didn't even have any cats and we have 2. I will be buying the crystals again from now on. I do not have the litter box system yet but will be getting that also.