this cover fit our very fat plush top king sized mattress just fine. it is difficult to put on because it encases the entire mattress like a bag and our mattress is extremely large and heavy, so getting it on was a challenge for the two of us. but i like the fact that the entire mattress is completely protected. it is also quite hot and sweaty to sleep on. of course, it has been extremely hot since we got it, but even with the central air on, i still feel like it makes me sweaty. it is really not breathable. but i don;t know how you can get such a complete cover and have it be waterproof and not have it be sweaty. i guess i will get some sort of a cotton mattress cover to put in between this cover and our sheets and see how that feels. i think it is well made and well worth the price though. 

Pros: fit, value, durability
Cons: very hard to put on, sweaty