Sealy PressureSmart Plush 12.5" Mattress

Getting my first decent mattress and ended up getting pushed towards something a bit above my target price range at MattressFirm and felt presssured to purchase in store so I did, then looked online and couldn't find anything on this specifically but sounds like lots of stories of people not liking similar ones so wondering if anyone had similar experiences.

5' 11" ~180lbs side/stomach sleeper and sometimes back.

Debating going in tomorrow and cancelling my order(I think that's possible since it hasn't been delivered yet?)

Wondering if anyone can speak for this mattress or similar/better options at the price range. Getting full size if it matters.