Hi suzanne2 and welcome to the Mattress Underground 
Keep in mind that the mattress you finally choose will be unique to you, based on your Stats (height, BMI, sleeping position(s), and any underlying health condition), and your PPP (Posture & alignment, Pressure relief, and Personal preferences). Reviews should be read with a skeptical eye…you never know who - or what P.R. Department - wrote them. And what does a random reviewer know about your specific comfort and support needs? You are the best judge of what you want in a mattress.
Aireloom has both a luxury and ultra luxury mattresses. In the Preferred Collection, there’s a Streamline plush and a Streamline M1 plush, which are viscoelastic foam and an innerspring support layer, and the Luxetop, Luxetop M2, and M2+ which have Celsion latex comfort layers, with visco and aireluxe foam and micro coils. Depending on your Stats and PPP, you may or may not have adequate support; it’s difficult to assess because, unfortunately, like Tempurpedic who you mentioned, are not very transparent on the densities and thicknesses of their components. A plush mattress will be the least dense foam and the ‘cocooning’ feel could simply mean you need to look at firmer comfort layers. The best way to see what kind of mattress you feel most comfortable on is, if possible, to test a few mattresses in person at local showrooms…you may like all an latex, a memory or polyfoam mattress or a hybrid. Narrowing it down to a few types can ease the mattress searching process.
Once you have a ‘shortlist’ of mattress types you feel most comfortable on, you might want to take a look at the Trusted Members of the site, who have been vetted for quality, transparency in specifications of materials and components, good return and exchange policies, and excellent customer service. If you find any specific mattress you have questions on, let us know and we may be able to help you assess them further.
@BillyIdol …’the mattress is quite good’ is not sufficient…assessing a quality mattress must be based on facts, like knowing the Mattress Specifications You Need To Know and comparing them to the Mattress Durability Guidelines.
~ Basilio