Hi callie,
The quality/density of the foam layers are certainly suitable for higher weights.
Quality/durability is a different issue than PPP (Posture and alignment, Pressure relief, and Personal preferences) though so I would do some careful testing on the Tempurpedic Rhapsody which it is based on to see how good a match it is for both of you. I would also make sure you have a more detailed conversation with them on the phone that includes the results of your testing on the Tempurpedic Rhapsody before you decide that the Regalis is the best “match” for the two of you (see mattress firmness/comfort levels in post #2 here).
Their regular customer support staff are great to deal with and very knowledgeable and helpful. The issues they have had with customer service have been connected to some of the occasions where there have been some issues that needed to be dealt with after a sale and the owners (not the regular customer service people) have been involved and are sometimes difficult to reach, slow to follow up on their commitments, and have overpromised and underdelivered. As frustrating as this may on the occasions it has happened (and it needs to improve) … it isn’t connected to the quality or value of their mattresses or the customer support provided by their regular customer service staff.
Phoenix