Hi bonbon412,
Purple certainly has a very aggressive advertising campaign (their ads show up everywhere once you have been to their site especially) and they are one of about 25 mattresses that I haven’t added yet to the list of what I call “simplified choice mattresses” in post #2 here. Post #1 in the same topic would be worth reading as well.
You can see some comments about the materials and components in the Purple mattress and the buckling column gel they use in post #2 here and the posts it links to.
Of course the only way to know for certain whether it would be a good “match” for you in terms of comfort, firmness, and PPP would be based on your own personal experience when you sleep on it (regardless of whether it would be suitable for anyone else) but like most of the simplified choice mattresses they have a great trial period and return policy that lets you test the mattress in your bedroom instead of a showroom with little risk.
Phoenix