Work very well, plenty thick. Seem to hold up pretty well. I've had mine for a couple of years and it doesn't show any wear. I use it several times a week. I don't know where they get them or what they pay but if I really needed one at home this is what I'd buy.
I use a kneeling pad I picked up at Lowe"s or home depot in the garden center just doesn't say snap on. I use for leaning over the radiator or kneeling works great.