Hi Nick S,
I would keep in mind that there are many versions of memory foam and some of them have a stronger and more noticeable smell than others. Some people can also be much more sensitive to certain smells (including the smell of latex) and may be affected by the smell of some materials that others may not be bothered by at all. As an example the smell of cooked cabbage also turns my stomach while others find it appetizing.
Having said that … the “safety” of a material isn’t necessarily connected to its smell and almost all materials will have some degree of off gassing that may have a smell even though the smell itself may not be harmful and will dissipate fairly quickly. The only reliable way to to assess the “safety” of different materials in more general terms is based on lab tests and the certifications they have for harmful substances and VOCs so that you have some assurance that any harmful VOCs are below the testing limits for the certification (see post #2 here for more information about some of the more reliable “safety” certifications). If the materials in a mattress or the mattress itself has a reliable “safety” certification then for most people they would certainly be “safe enough” … regardless of the type of material, the smell of the material, or the name of the manufacturer on the label, although of course some people that are more sensitive or that have certain health conditions (such as MCS or multiple chemical sensitivities) may still be affected by a material that is certified even if it would be fine for most people.
Latex and memory foam are very different materials with very different properties and each person may have their own preference between them. There are certainly some people that strongly prefer memory foam and there are some people that strongly prefer latex. There is more about the pros and cons of latex vs memory foam in post #2 here.
Assuming that the materials in a mattress you are considering are durable enough for your body type and meet the quality/durability guidelines here relative to your weight range … the choice between different types and combinations of materials and components or different types of mattresses are more of a preference and a budget choice than a “better/worse” choice (see this article). The best way to know which type of materials or which type of mattresses you may tend to prefer in general terms will be based on your own careful testing and personal experience because different people can have very different preferences.
Savvy Rest certainly uses high quality and durable materials in their mattresses but they are also in a much higher price range than many other similar component mattresses that use the same materials and components and have a similar design.
Outside of rare exceptions where there is damage to a shipment that can happen with any product (which would result in a shipping claim and a replacement pocket coil) … there would be no problem with any damage to the coils in shipping.
I’m not sure you are clear between the difference between a box spring and a foundation. A box spring has springs inside it that flex under the mattress and there are very few one sided mattresses today that use them as a support system and in many cases they will invalidate a mattress warranty. Most mattresses in the industry today need a steel or wooden bedframe with a foundation that has minimal to no flex (vs a box spring that flexes) or a platform bed which also has little to no flex under the mattress. There are many in the industry that mix up the terminology between box springs and foundations even though they are very different products.
If you have a foundation (vs a box spring) then the manufacturer of a mattress will generally be the most reliable source of guidance about whether it would be suitable for the mattress you purchase (different manufacturers can have different requirements for a support system under their mattresses) but if your foundation is suitable for your mattress and is still in relatively new condition and the support surface is still perfectly flat with no sagging and it’s structurally able to support your mattress and the people sleeping on it then it would probably be OK.
There is more about the 3 most important parts of the “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
While nobody can speak to how any mattress will feel for someone else in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief, and your own Personal preferences) … the Arizona Premium certainly uses high quality and very durable materials and there are no lower quality materials or weak links in the mattress that would compromise the durability or useful life of the mattress.
There are many people who prefer latex/innerspring hybrids (see post #13 here) and outside of any other local options that may be available in your area … some of the better innerspring/latex options I’m aware of are listed in post #2 here and the post it links to but if you wish to test any of them in person you would need to check their websites or call them to see if any of them have a dealer close to you.
Phoenix