This cajon pad is great value for the price.
It's thin but makes the cajon a lot more comfortable to sit on.
It stays put and helps you to not slip on the top of the cajon - this is important if you, like I do, lean the cajon when playing.
About the quality: mine is a bit frayed and pieces are missing at the corners ...but on the other hand, I've had it since 2012. So considering both the price and that it is a piece of foam it's pretty durable.