Hi hokka,
This is what the tutorial is “supposed” to do (so you will have questions that most people don’t know or realize they should be asking).
Your personal testing and the information in the tutorial will help you answer the questions based on your actual experiences so that you can choose a mattress that is the best match for all the parts of your personal value equation that are most important to you.
You will also know to only test mattresses where you are able to find out exactly what is inside them (see this article)
Once you have decided on some local retailers and manufacturers to visit based on your phone calls … then the next step would be to visit them and narrow down your choices to one finalist at each one. This is also the time to add any online options that you are interested in based on your testing and your conversations with each one you are considering.
Once you’ve done this then you will have final choices that are between “good and good” and none of them will have any “weak links” in terms of quality and then the last step is to narrow down your finalists to one.
Phoenix