Hi natinaut,
Post #2 here and the posts it links to has more information about safe, natural, organic, “chemical free”, and green mattresses and mattress materials that can help you sort through some of the marketing information and terminology that you will encounter in the industry and can help you differentiate between them and decide on the types of materials you are most comfortable having in your mattress and help you answer “how safe is safe enough for me”. These types of issues are complex and are generally specific to each person and their individual sensitivities, circumstances, and specific criteria.
They would be a much more reliable source of specific guidance about “comfort” issues and choices but a mattress with 3" of Talalay latex in a suitable firmness level can certainly make a very good choice in terms of PPP for most people as long as they prefer the feel of Talalay latex over other types of comfort materials. The top 3" to 6" of a mattress (depending on your body type and sleeping positions which will affect how deeply you sink into a mattress) are the layers that will tend to have the biggest effect on what you feel on a mattress.
There isn’t a way to quantify exactly how long any mattress will last for a particular person and when the gradual loss of comfort and/or support over time will lead to someone no longer sleeping well enough on a mattress and deciding to replace it even if it would still be suitable for the other one or for someone else (see post #2 here). The only meaningful durability comparisons that it’s really possible to make is in comparison to another mattress where you can say “this mattress is likely to be more durable than that one” without attaching a specific number to either one.
Having said that … if a mattress meets the guidelines listed here and you are well inside the range of comfort and support that is suitable for you when it was new then it would be reasonable to expect that for most people it would last in the range of 7 - 10 years before they decided to replace it. If the quality/durability of the materials is higher than the minimum guidelines listed (such as using latex in the comfort layers) then it would be reasonable to expect that for most people it would last for 10 or more years before they decided to replace it although this will be different for different people.
In most cases all the mattresses made by the same manufacturer would be in a similar value range and price differences between different mattresses would generally tend to reflect the differences in the cost of manufacturing and the different materials and components in each mattress along with the cost of any differences in the return or exchange policies although the margins in higher budget mattresses are often a little higher as well.
The Dreamfoam mattress that is closest to the Bamboo Bliss is the Ultimate Dreams Eurotop and you can see a comparison between them in post #16 here.
The Ultimate Dreams latex is similar to the Eurotop in terms of the materials inside it except it uses a thinner polyfoam support core and it uses a less costly cover and doesn’t have the ability to exchange the comfort layer after a purchase which provides the option of changing your firmness choice after a purchase without having to replace the entire mattress which can lower the risk of making a firmness choice that isn’t as suitable as you hoped for.
Which of these would be the “best value” for you would depend on the parts of your personal value equation that are most important to you and whether the benefits of a higher budget mattress (either in terms of higher quality or higher performance materials or components, greater durability, or more flexible options after a purchase) were “worth it” to you.
Phoenix