I have noticed that many manufacturers are gravitating towards the Marshall coil system – or a variation of it. A Marshall coil is a unit with individual coils that operate independently. The benefit to you is that it is a much more conforming feel, and far less motion transfer – you will not feel your partner move.

I think this is a wise move. The old offset and Bonnell systems, that had the coils “laced” together, did not conform well at all. In order to get the most conformance, you had to pile on comfort layers. This only made the body impression issue worse for consumers.