OH MY GOSH, if you have trouble sleeping because your mattress has become uncomfortable over the years, do yourself and your body a favor and order this Mattress Pad Topper ASAP! My back has been hurting because our mattress is worn but we just didnt have the money to purchase the high-end mattress that I want....Im soooo happy my husband and I didnt stress ourselves to purchase another mattress because this topper is EVERYTHING! Its been 2 nights since we received it and Im ready to go to sleep right now lol. I didnt experience the crate foam being smelly, it expanded in no time once we cut it out of the plastic. Theres also cushing in the white cover which is what gives it a total of 5.5 inches. Super awesome, best purchase Ive made this year