I had been on the fence about ordering this for a while, mainly due to the price, but then I got an Amazon gift card and decided to take the plunge. SO glad I did! My brush collection includes Sigma, Morphe, Too Faced, Urban Decay, Sephora, and ELF. The mat worked wonderfully for all of them. My 3DHD foundation brush was in bad need of a deep clean and now it looks basically new. The suction cups work well to adhere the mat to the sink so it doesn't move around while you're scrubbing your brushes. Size wise, I included a photo of it on top of my 13" Macbook Air for comparison. It fit nicely in my sink with plenty of room for washing the brushes. I went with the advice of another review that said they hung their mat in the shower to dry, and that's where mine is now before it goes back in its container for storage.
Overall, worth the investment for the best clean your brushes can get.