Removes their undercoat - avoid
I have a medium fur length cat does remove a huge amount of fur - too much.
It’s also very clear that it removes the soft undercoat they use to regulate their body temperature. I used this properly once and only once, it took weeks for her fur to grow back healthily.
I use a cheap little paddle brush now once a week paired with anti hairball food and she loves the attention of being groomed like a little princess!