I purchased two of these on Amazon on accident, and am unable to ship it back to the manufacturer without a fee. The device itself works very well, and has 13L storage capacity that keeps smells away (waste bin is "sealed" off). If you suffer from back/knee problems, have multiple cats, and/or are a busy person, this is great investment! Large cats can fit fine (my ragdoll included). Device itself has a sensor and "delayed" clean mode to make sure the cat is outside the unit. Motor is relatively quiet. Feel free to send questions regarding the device!