I've got the Petkit Eversweet 2 model and I much prefer it to these new Eversweet Solo models. I don't like the colours these come in and I really don't like the lights. Hoping Petkit don't ever discontinue the white Eversweet 2 model because I love it and my cat loves it too!!! Mine has a white motor which is fantastic because you can clearly see if any algae is growing on it and easily remove it. I really don't like the black motors because the algae grows unseen on them unless you use a white cotton bud to remove it.