Hi Mattress,
Just in case you haven’t read it yet … the first place I would start your research is the tutorial post here which has all the basic information, steps, and guidelines that can help you make the best possible choices … and know how and why to avoid the worst ones.
Unfortunately … the specs you listed aren’t complete so it really isn’t possible to make any meaningful comments about the mattress.
The innerspring itself is a low gauge thicker wire which would be a firm and durable choice but the weak link of a mattress is usually in the comfort layers above the innerspring not the support components and the specs you posted only include the type of foam but no information about the quality or durability of the foam materials that are above the innerspring. The information you would need to make an informed choice about any mattress is in this article and if you can find out and list them on the forum I’d be happy to make some comments about the materials or help you identify any possible weak links in the mattress. Without this there is no way to identify any weak links or make meaningful comparisons with other mattresses.
Dreamstar or their retailers should be able to provide the information you need and they are a regional wholesale manufacturer that can be among the better choices in your area but if for any reason you aren’t able to find out I would pass the mattress by because buying a mattress where there is no way to assess the quality or durability of what you are buying can be very risky … particularly if there are almost 6" of unknown quality materials in the upper layers of the mattress. A mattress will tend to soften and break down from the top down so the quality and durability of the upper layers are the most important part of the useful life of a mattress.
Ontario is very large so if you can let me know your city or postal code I’d be happy to link you to the forum list of the better options or possibilities I’m aware of in your general area.
Phoenix