Hi Cassie16,
There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between different mattresses.
I don’t know the specifics of the materials and components in the Acadia but if you can find out the information listed here and post it on the forum then I’d certainly be happy to comment about the quality of the materials inside it or help you identify any potential weak links in the mattress but Portland Mattress Makers certainly makes some good quality mattresses and a two sided mattress will also be more durable than an equivalent one sided mattress that otherwise uses the same materials (see post #3 here).
The best way to know whether the motion isolation of a mattress is “good enough” for you or whether a mattress is a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) would be based on your own careful testing (using the testing guidelines in the tutorial post) with both of you on the mattress so you can use your actual “real life” experience to decide.
Phoenix