Good but take care
I brought this brush last week. We adopted two long haired cats a few years ago. Both never been brushed. I use a big standard brush on both but neither really enjoyed it as they weren't use to it.
In time they were OK with it, but only for 5 mins or so. The furminator is quick and takes off a lot of fur especially on their bushy tails. I will only use for 5 mins once a week though, incase it thins the hair too much. It's common sense really. It's to help with hairballs hopefully?