Hi javaqueen601,
There is more about the different ways that one mattress can match another one in post #9 here.
The Vi Spring mattresses don’t use microcoils but use one or more narrower diameter pocket coils with relatively high coil counts as their support core(s) and then use combinations of different types of natural fibers as their comfort layers. Post #4 here has a list of other inerspring/natural fiber mattresses but most of the Vi Spring competitors that had build similar mattresses with the same hand building methods would also be in much higher price ranges.
You can also read more about “ultra luxury” mattresses in post #2 here and post #2 here. These are mattresses where what you feel “about” the mattress would be just as important as what you feel “on” the mattress and would be more attractive to a very small percentage of people who have a different sense of “value” from the norm. In most cases you should easily be able to find a mattress that is just as good a match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences), is just as comfortable, and would be just as durable in much more reasonable price ranges but the only way to decide which mattresses are just as good a match for you in terms of PPP would be based on your own personal testing or experience because you won’t be able to “match” a mattress like a Vi Spring based on specs.
There is a lot of misinformation about organic, natural, chemical free, green, and “safe” mattresses and materials throughout the industry but there is more information in post #2 here that can help you sort through and differentiate the more factual information from the marketing information you will encounter about all of these interrelated topics that can help you choose a mattress and materials that meet your criteria in any budget range and that can help answer your questions about “how safe is safe enough for me?”.
Phoenix