Hi mitch3644,
You can read some of my comments about Northwest Bedding in post #2 here and the posts it links to but like all manufacturers they make a wide range of mattresses that use both higher and lower quality materials and components so regardless of the name of a manufacturer … the only way to know the quality of a mattress would be by finding out the specifics of the materials inside it (see this article).
If you can’t find out the information you need to identify any potential weak links in a mattress or make more meaningful comparisons with other mattresses … and the retailer won’t take the time to find out for you … I would pass the mattress by.
Phoenix