Is the plush comfort level right for back sleepers?

Usually not. The deep memory foam sink suits side sleepers, but back and stomach sleepers often want a firmer level for spinal support. A lower comfort level in the same line is the better match.

Does the pocket coil system reduce motion transfer?

Yes. Individually pocketed springs move separately, so a partner's turning is felt far less than on a connected coil mattress. Couples consistently note this as a strength.

Will the memory foam make me sleep hot?

It can. The cover is temperature-regulating, but memory foam still traps some heat. Hot sleepers should weigh this against a latex or gel-foam alternative.

How thick is this mattress and what foundation does it need?

It is 16 inches thick, so it needs a sturdy foundation or adjustable base rated for a heavy king mattress. A standard low-profile box spring may make the bed sit very high.

Does a plush mattress soften over time?

Yes, some softening is normal with memory foam tops. Owners report the surface getting plusher within the first months, so those wanting firm support should choose a firmer comfort level.