Good evening,
Saw this website and felt my expertise could be of service. As my username suggests, I am a mattress salesman. I will not disclose who I work for. I am solely here to help answer questions. I am experienced with Sealy, Simmons, Serta, TEMPUR-Pedic, as well as local brands around my area (which I can’t disclose to protect my privacy). I hope I can be of some use around here!
Cheers,
Dat Salesman
Hi Dat Salesman,
Welcome to the Mattress Forum!.
You’re certainly welcome to post here and all expertise is always appreciated and welcome 
You will find though that the major brands that you mentioned … or any manufacturer that won’t disclose the quality of the materials they use in their mattresses … are among the brands that for the most part are among the “avoid” group of manufacturers mentioned here and in the guidelines here partly because they use lower quality or undisclosed materials and partly because they aren’t particularly good value compared to many of the smaller manufacturers across the country.
Phoenix