Hi FayH,
The first place I would start your mattress research is the tutorial post here which has all the basic information, steps, and guidelines that can help you make the best possible choice … and know how and why to avoid the worst ones.
Therapedic is one of the larger manufacturers in the country (see here). They are a licensee group which means that they have different mattresses in different parts of the country depending on which of the licensee factory makes them and some of their mattresses would be unique to the area that each licensee factory services.
Regardless of the name of the manufacturer on a label (which means very little) … the most important part of a mattress purchase is how well it matches your unique needs and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences). Regardless of the price or quality of a mattress … if it’s not a good match for you in terms of PPP it would have little value to you.
The next most important part of the “value” of a mattress purchase is the quality of the construction and the materials inside the mattress. If a mattress you purchase uses lower quality and less durable materials they can soften, compress, or break down too quickly relative to the price you paid. This can result in the loss of the comfort and support which was the reason you bought it in the first place and the need to replace the mattress. The loss of comfort and support isn’t covered by a warranty. I wouldn’t consider any mattress unless you are able to find out what is inside it (see this article) so you can make sure there are no weak links in the mattress and make more meaningful comparisons with other mattresses (see post #4 here).
Finally … if your careful and objective testing indicates the mattress is a good match for you in terms of PPP and the mattress uses good quality materials relative to the budget range you are in … then the other parts of your personal value equation that are most important to you would also be important parts of the “value” of a mattress purchase.
If you can find out and post the specs of the mattress you are considering on the forum I’d be happy to comment on the quality of the materials inside it and help you identify whether it may have any weak links in it’s design.
Once you reach step 3 of the tutorial post … if you let me know your city or zip code I’d also be happy to let you know of any of the better options or possibilities I’m aware of in your area.
Phoenix