'Use - Play some music!'
Yeah, you can buy better brushes in the market ...but if you are looking at these you probably know that yet. I think at this price they can help you, at least if you are not relying a repertoire entirely on them - like an intense ballads or Jazz gig or symphonic percussion work - and want to have a pair of them around for occasional use on some songs or intros and give another texture to your drum kit.
'My conclusion'
Recommended, as always if you do not expect the best weight / balance or the best build / construction.