@Laura2592
been there done that... we had the same mattress for guests as my daughter has in her own bedroom (and she likes it). A small percentage (maybe 2%) of guests complained about it so I decided to buy a better one. So I spent a lot of time and money, we struggled to deliver it and to carry it up the stairs, unpack it, put it on the bed and we took the old mattress home (and have no clue what to do with it now). A new mattress is also heavier and more difficult to lift while changing the sheets (I have arthritis) but everything for our guest's happiness.
Since we bought a new mattress nobody complained any more but nobody praises it either.
Was it worth it? Would I repeat it? No.