Hi Dedtired,
You can see some generic comments about Verlo in post #12 here and in post #18 here. The most important part of dealing with a manufacturer like Verlo is that they will disclose the specifics of all the materials and components in their mattress. As you mentioned they will also make changes to your mattress after a purchase if it’s necessary which can be a real benefit for those who need it.
A mattress is only as good as its construction and the quality of the materials inside it and the only way to make meaningful comparisons between mattresses is by knowing the specifics of what is inside each mattress you are comparing. The quality of a specific mattress always depends on the specifics of what is inside it … not on the name of the manufacturer that is on the label. The good news about Verlo is that they provide the information that allows you to assess the quality of their mattresses and in most cases the major brands don’t.
The first place I would start with your mattress research is post #1 here which has the basic information, steps, and guidelines that can help you make the best possible choices … and avoid the worst ones … which generally includes all the major brands or any other manufacturer that isn’t completely transparent and doesn’t disclose the quality of the materials they use in their mattresses.
Upholstery grade polyfoam generally means 1.8 lb polyfoam or better which is a higher grade of foam than the major manufacturers generally use but this is really a generic description and the actual density of each layer of foam in the mattress is what you really need to know. Like mattresses … furniture can use a wide range of foam materials from low to high quality so “upholstery grade” is more of a marketing term than it is a specific grade or density of foam.
Phoenix