Hi Jgunschel,
I noticed that you used your email as your username which may lead to some of the bots around the internet adding you to their spam lists. If you’d like me to change it for you to the part before the @ just let me know and I’d be happy to do so.
I personally think highly of both of them. Gardner is on the Boston list in post #2 here and Yankee Mattress is on the Springfield list in post #4 here. Both are knowledgeable, use good quality materials in their mattresses, and are better “value” than most of the mainstream choices that most people end up purchasing. (NOTE ADDED: Yankee Mattress is also now a member of this site)
A forum search on Yankee and on Gardner (you can just click these) will bring up more information about both of them. The search on “gardner” will also bring up some results for “gardners” (with an “s”) which is a retailer and not the same business.
Of course a mattress is only as good as it’s construction and the type and quality of the materials inside it along with it’s suitability for your specific needs and preferences so comparing the specifics of the mattresses you are considering is just as important if not more so than comparing the manufacturers.
Phoenix