My 4.5kg indoor kitten loves it! It's a shame the sisal rope is not on the top part as this is what gets scratched the most but totally worth it regardless. Update: This is by far the best purchase ever for my cat! He's up and down and playing on it every day. It is completely destroyed, but that's because he has sharp nails and we're thinking of revamping it with new rope and give it a new life.