I ordered two of these and gave them to my sons. My oldest loves his bed, but my other son, with a bad back, could not sleep on it. I tried it on my bed but found it too soft also. It is like a large pillow that needs to be fluffed after use. It is however a nice quality bed topper and OK for the price.
I have no idea how old my mattress is living in a dorm i've never had a mattress problem, but for a while I was waking up with back and neck pain. Then finally i decided it was time to make my bed sleepable, buying this mattress pad was the best college decision i've made yet (&im a 3rd yr college student!). It's a bit $$ but worth every dollar.