I bought that Mattress Top almost 2 years ago, because I was looking for a solution for my sleepless nights. Looking for something that makes sleep restful instead of painful. I couldn't sleep for more than an hour without waking up. Had to get up and move around before I tried sleeping again...
The Memory Foam I bought is way better than I ever expected: I sleep through the night and I would wake up refreshed.
Also after almost 2 years of usage the mattress top is in the same condition when we bought (except some discoloration)
I have to add that my husband who thought he didn't think he needed one became a big fan of the mattress top and says he never slept better.