Works as well as my 'official' brand

Works as well as my 'official' brand, which I found was just too overpriced for me. Can't say I've noticed any difference since switching. One thing I'd say is definitely pay attention to make sure you're putting it the right way. They come in a no fuss box with no bells and whistles.

I can 100% confirm that these fit in the Catit flower fountain, the problem is, many people expected them to fit in the smaller Catit 2.0 flower fountain (a recent release). These are for the 'Catit Flower Fountain 3L', the big round one.