Hi FAUguy,
As you know I would normally suggest avoiding any of the mattress you mentioned you were considering in your previous post for all the reasons that I’ve outlined in my earlier replies but now that you have made your purchase I would probably sleep on the mattress for a few weeks (preferably 30 days or longer) to see how things work out as the mattress breaks in and you adjust to the feel of a different sleeping surface (see post #3 here).
Unfortunately City Mattress doesn’t allow refunds and only has a 90 day exchange policy so if after you have slept on the mattress for a few weeks it still isn’t working out for you then you would be in a somewhat difficult position where you need to exchange a mattress and are “locked in” to a store where I would normally suggest avoiding most of the mattresses they sell and where there may not be any particularly good quality/value options available to you. Their cost for an exchange is lower after 30 days and lower yet after 60 days so it would make some sense to wait as long as you reasonably can.
When you are in this type of more difficult situation there are some suggestions and ideas in post #2 here about the two main strategies that you can use that can help you make the best of a difficult situation.
If the only issue with your mattress is that it’s too firm and you need some additional softness and pressure relief then a topper can also be an effective solution as well and wouldn’t be much more than their exchange costs and post #2 here and the topper guidelines it links to can help you use your sleeping experience as a reference point and guideline for choosing the type, thickness, and firmness for a topper that has the least possible risk and the best chance for success and also includes a link to a list of some of the better sources for toppers I’m aware of as well.
Phoenix