Hi Groggy23,
You can see my thoughts about Tempurpedic in post #2 here and the other posts it links to.
The tutorial post here also has all the basic information, steps, and guidelines that can help people make the best possible choices and I would generally suggest avoiding the major brands and chain stores completely although unfortunately … once you’ve made a purchase there … you are usually limited to choosing one of the mattresses they sell for an exchange if there is no refund policy.
The Acclamation uses a combination of 5 lb memory foam over their gel memory foam (probably 4 lbs density) which are good and medium quality materials respectively so from a quality point of view (and unlike some of the other iSeries mattresses) there are no low quality materials in the mattresses or obvious weak links in the materials. The quality of the materials though doesn’t say anything about whether a mattress is a good match for you in terms of PPP and the major brands tend not to be particularly good value compared to many other mattresses made by smaller manufacturers that use similar quality materials.
If you end up exchanging the mattress for another one I would make sure you do some very careful and objective testing to make sure it is a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) and make sure you know the specifics of every layer in a mattress you are considering exchanging for so that you can make sure there are no lower quality materials or weak links in the mattress that can affect durability and reduce the useful life of the mattress before you decide on the exchange.
Phoenix