Angelyn 4 I bought two sets of this toothbrush for 2 of my cats. I think it is very easy to use. The brush is very soft and not hurting the gum of my cats. The sponge is good for the first introduction of brushing behavior to the cats, it works well for one of my cats. She does not feel uncomfortable when I brush her teeth with the sponge for a few days, then switch to the brush. My other cat is a bit aggressive, he bites the sponge on the first attempt. The sponge breaks into pieces right after that. =.=" Anyway, he managed to get used to brushing teeth with the toothbrush. I hope the sponge can be made more durable for cat bites, just a suggestion. So far, it is a good experience. My cats accept the toothbrush and do not feel bad after brushing. I will consider buying again when the ones I am using get old and need to be changed.