As with many items such as this (bedspreads, mattress pads, mattress toppers, sheets) there is a strong odor (chemical type) when first opening this item. You'll likely want to wash it first before using. That took care of that problem for me. This fits very nicely on a queen plush mattress with 4 inch mattress pad added.
Bought this to replace a standard pad that had been shrunk in the wash to the point that it did not fit our bed. The padding on this is wonderful! We have a pillow top mattress, which is great, but the padding in this is very down-y and fluffy and like sleeping on top of an actual pillow. We love it so far!
I have a 3 inch memory foam on top of my bed. This cover easily covered it. The material on the sides is better than most and the padding is about an inch on top. Washed it first to get rid of 'new' smell. I dried it in dryer. There were a couple of areas that stuck together on the back side in the dryer but didn't have any trouble pulling it back apart. Didn't shrink any. Fits and feels great. Excellent price for this quality. I'm pleased.