Hi asudixon,
I merged your post to another thread with the same title and some of my thoughts about the Optimum are in the earlier posts in this thread. There are more comments at the end of post #4 here.
The only way to know the quality and durability of a mattress is to know the specifics of the materials that are in it. Other than that … you are at the mercy of marketing stories rather than the type of accurate information that can be used to make more meaningful comparisons between mattresses.
Sealy (along with most of the other major brands or what are often called “S” brands along with Tempurpedic and Comfort Solutions among others) is not a brand that I would consider. The only exception to this … and this would be very rare … is if I had tested a specific mattress that for some reason was different from any other and I knew the materials and layering of that specific mattress and they compared favorably in terms of quality and value with local manufacturers or other smaller independent brands sold at smaller “sleep shop” outlets that tend to have much better quality and value.
The first of the guidelines that I list in this article is …
1. Avoid buying a mattress made by any of the major national brands such as Sealy, Simmons, Serta, Tempurpedic. While they are not all “bad” mattresses and some may even be good quality, … none of them have good value when compared to similar mattresses made by smaller independent manufacturers. NONE
If you let me know the city you live in … I’d be happy to let you know about any local manufacturers or better outlets I may know about that have higher levels of knowledge and service and offer better quality and value.
Hope this helps 
Phoenix