I was using a litter box similar to this that had a hose that extended from the box to the window. It works great but it needs to be by a window and then that window is not usable. I bought this box because I needed to move the litter away from the window. I read the reviews and decided to take a chance. It works! I never smell litter. I've been using it for about 6 weeks now. I have two adult cats. The actual box has some design issues. I find the cats can kick litter out of the box or miss. We put the box inside a large plastic container so any mess is contained and there is no litter being tracked in the house. I keep it plugged in 24/7. The cats took a day to get used to it even though they were already using a box that was plugged in. The filter is lasting on par with how long it is expected. The top of the box shows as the wear life is used up. I'm 6 weeks in and it is down to the last two lights. I don't know why anyone would use a regular litter box. Buy this one and no one will smell cat or litter in your house again. :)