Hi redwinger,
An adjustable bed is more of a commodity than a mattress with a fixed set of features and when you are buying an adjustable bed I would compare them feature to feature to decide on which one is best for you.
The adjustable bed thread here may be helpful and also has some links you can use as a reference points for “value”.
There is also more information and a video link about the Mantua Rize Contemporary here (which is their Ergomatic 5).
Phoenix