On the whole a great product - I’ve had no leaking problems with it so far from two kittens using it. Instructions for putting it together were a bit rubbish. However I worked it out myself quite easily. Looks the part. Doesn’t keep in smell - but my two aren’t yet used to the cat flap so not currently using it.  It doesn’t sit very well in my opinion anyway. Only other gripe is that the lid won’t stay up if kitties  want to get in and out that way.  Looks really cool though so not a deal breaker. Nice touch that the litter scoop has a home.  Just make sure the tray is sitting correctly otherwise it may leave gaps where leaks could potentially happen.  Tray is white so with repeated use (despite regular cleaning) may be prone to staining.Will be buying a second box.