Not sure how long it will last!
The brush fits my purpose for traveling and fitting in my purse for quick fix me ups.  Having said that, I have very thick hair and it works if I am very careful. You push out the bristles but sometimes they go back in when I'm mid way through a strand of hair. I'm glad there are four because I don't see these lasting more than a month if that.  In conclusion, buy it for convenience not because it's going to be your "go to" brush forever.
Rating: 2 stars