Hi timberghost,
You can read a little more about the iComfort mattresses in post #11 here and more about the Tempurpedics in post #10 here and post #2 here.
The guidelines in the “read first” post suggest avoiding both of these or any mattress where the information about the quality of the materials isn’t available or any retailer where you aren’t able to find out the information you need to make an informed decision. If you shop in these places you will only be making a blind purchase with no way to make meaningful comparisons with other mattresses.
You can read a little more about trying to match one mattress to another in post #2 here. In the case of the iComforts the only way to compare them would be based on how their subjective “feel” in side by side testing and of course this doesn’t say anything about how the quality of the materials or the value compares because you would need to know the details of what is in each mattress to make meaningful quality or value comparisons. In the case of the Tempurpedics there are some online manufacturers who compare their mattresses to the Tempurpedic lineup in terms of “feel”, design, or the quality of materials (or in some cases all three) so if you are considering one of these then it would be worth testing the Tempurpedics as a guideline for an online choice.
Other than this … these are both in the list of mattresses I wouldn’t even consider because they are either lower quality, lower value, or both and I wouldn’t send any time testing them because even if you happen to like them (other than the Tempurpedics) you generally won’t be able to find out the quality of the materials and you would be no further ahead in terms of making an informed decision or being able to make comparisons with other mattresses than if you hadn’t tested them in the first place. testing mattresses where you don’t know ahead of time that you will be able to find out what is in them is generally a waste of time and will only lead to frustration for anyone who wants to know the quality, durability, and value of what they are buying.
Phoenix