Two cats, two people, small bedsit, on live long enough to know they don’t take the bin out regularly. You can’t tell me this room smells nice meaning they too smell nice. Where my cats litter tray is, it’s massive, aired out, air purifier runs regularly, litter changed twice a day and replaced every 2 weeks, stainless steel and cleaned with enzymes. I also use a odour trapping litter (tofu) and it’s brilliant but, it’s animal piss and poo. You can smell it no matter what you do. You cannot tell me that room, does not HUFF.