Hi Nannie66,
These are only available locally as far as I know because of the shipping costs involved with non local purchases. If you are local then they can make a good choice.
You can read about some of the pros and cons between an all latex mattress and a latex/polyfoam hybrid in post #2 here.
Outside of personal testing on the mattress … the best way to choose a firmness level would always be a more detailed conversation with the manufacturer themselves who will know more about their mattresses and how they interact with different body types, sleeping styles, and preferences based on “averages” than anyone else. There are some links to some of the “theory” that involves different weights, sleeping positions, and body types in mattress firmness/comfort levels in post #2 here that can be used as generic guidelines but these are only generic and not specific to any individual and using “theory at a distance” is not generally as effective as personal testing or a more detailed conversation with the manufacturer themselves.
Of course SleepEz is one of the manufacturing members here which means that I believe they are among the best quality/value available no matter which of their mattresses you choose (“value” tends to be quite consistent across the entire lineup of a specific manufacturer) but this is only part of the picture and the suitability of a mattress in terms of PPP )Posture and alignment, Pressure relief, and Personal preferences) and the options you have after a purchase if you make a choice that is less than ideal is always just as important.
Phoenix