I purchased this mattress cover a couple of weeks ago and my three year old son has tested the waterproof capability about five times already. We've washed it six times and it has held up very well to the frequent washing and drying. It is very, very thick - I have trouble fitting it in my linen closet folded. It's so comfortable too - no trash bag or plastic feel / noise at all. We find it to be almost as comfortable as a goose down cover we have on another mattress. The cover fits our overstuffed mattress and goes on and off very easily. We really are satisfied with comfort and the fact it does what it's supposed to. That being said - I have only one minor complaint. The thin, elastic material that covers the sides of the mattresses is very soft - I put my fingernail through it when I was putting it on the mattress. I don't have long or jagged nails; the material is just very thin. The hole that my nail made has not yet pulled or gotten bigger, so it's still holding up! I guess the material being so thin is good for fitting big or oversized mattresses. I will be buying another one of these and highly recommend it to anyone who needs a waterproof mattress pad that doesn't feel like you're sleeping on a trash bag! A little pricey, but worth it.