It strong but I am not a fan of the flex part
So I am unable to give a decent review.

Great tool!

Works great on my standard poodle who was tangled. She seemed less annoyed with it than every other brush or comb I’ve ever used. I also used it on my horse’s mane. He has a very thick wavy mane and does not usually enjoy having it combed. With this brush

I immediately put it to work on my 2 Pyr's, 1 CAO, 1 DLH cat, and 2 DSH cats and it works great. (Used in conjunction with a comb for line brushing on the long haired ones) None of my dogs or cats were matted, just their regular brushing. Much better then

I love this brush for my Yorkies, I have ordered it many many times and have told others to order it