I ordered two of the 4-inch toppers and LOVE THEM!! They arrived in 5 days so that was great! I previously had a 3" topper on my bed and I did enjoy that, but I would definitely go with the 4". It does make a difference! My 9 year old has the 3" topper now, my 13 year old has a 4" and I have a 4". Next on my list is to get one for my daughter. I just love getting in my bed now. I do wish it came with a cover like my 3" one did, but they didn't. You can't go wrong buying this!!! Thank you Overstock!