Here's the update on my purchase and experience. I had planned on ordering the 9" Twin Natural Latex Mattress bundle with the layers being a 3" Medium 100% Dunlop layer on the bottom, then a 3" Soft 100% Dunlop layer in the middle, then a 2" Soft Blended Talalay on top. I got talked out of that arrangement on the phone. After much discussion of various options, I ended up ordering the 9" Twin Natural Latex Mattress bundle with the layers being 3" Medium 100% Dunlop on the bottom, then 3" Medium Blended Talalay, then 2" Blended Talalay on top.
The result? I did NOT like the blended Talalay at all! I didn't like the more chemical odor (as opposed to a more rubber-like odor), I didn't like the Talalay feel, and it seemed to hold body heat worse than my experience with 100% natural Dunlop latex toppers.. The whole bed was too mushy. I actually think my originally intended layers would have been LESS mushy. I rearranged the layers. First I swapped the two Talalay layers so the medium was on top and the soft in the middle - still too mushy, didn't solve the odor problem or the heat retention. Next I put the two Talalay layers on the bottom with the medium 100% Dunlop layer on top - that was definitely better, but still too mushy and didn't solve the odor issue. I decided to avail myself of the opportunity to swap out layers. I have to say that Sleep EZ customer service was very accommodating in working with me to swap out both Talalay layers instead of just one. So what I ended up with was a more standard arrangement - 3" Firm 100% Dunlop on the bottom, 3" Medium 100% Dunlop in the middle, and 2" Soft 100% Dunlop on top.
I wish that I could say that I have now found the perfect mattress which is a total delight to sleep on and solves all of my pressure point and back pain issues, unfortunately it has night. I am rather disappointed, to say the least. My experience with a 3" latex topper on my hard-as-a-rock Sleep Number airbed had convinced me that an entirely latex mattress might be the perfect mattress for me. What I have found is that I usually still have hip pain lying on my side, which would indicate possibly it is too firm; but I frequently get lower back pain when lying on my back, which would indicate possibly it is too soft. However, it is the most comfortable when I am lying on my back. I am back to thinking that it is not possible for me to get a mattress that will work for me. I am keeping the mattress though. Some nights I do better on it than other nights. I am not entirely blaming the mattress. I think my body just doesn't cooperate with anything. (Note, I am not overweight. I am 5' 5" and 120 lbs.)
Regarding Sleep EZ, as I stated above, their customer service was excellent and very accommodating. The one thing I don't like, however, is I what I regard as a sales gimmick. The "sale" that I mentioned earlier in this topic thread, the supposed expiration date of which was what caused me to order sooner than I was ready to do, turns out to be an ongoing sale under different names with always updated expiration dates. I wish they would just say that they always have $X off plus free sheet set and pillow when you buy a whole mattress within certain specifications as opposed to buying layers, instead of falsely making it look like it is some temporary special, seasonal sale. I don't like gimmicks for anything. Otherwise, I concur that Sleep EZ is a great company to shop from.