I am considering purchasing a latex mattress in the near future.  I've been doing my homework by researching and visiting several local showrooms to try them.  There are two main reasons why I like them: long lasting promise and ecological friendly approach.  What I like least is: the high cost of this set.  Therefore, I want to make a smart investment with my next purchase.  I would really like to hear comments from other savvy buyers (satisfied and non satisfied) who can give me advised in this matter. Any recommendations or considerations I should be looking for?  Thank you very much!

The specification of the mattress set I am looking at: 

Manufacturer:  Simmons
Make Natural Care Latex
Model:  Burma Firm (Talalay latex, Ultra Foam, Surface Enclosed Edge Support)
Firm PURFoam: Extra Firm
Foundation Options:  Triton Foundation 9 inches or Low Profile 5.5 inches
Full size complete set
Warranty:  20 years (10 years non prorated)
Suggested price:  $4499
Sale:  $2249
Extra 20%; $1799