At the processing and the usability of the product is nothing to complain. I have a very hard mattress (M-Line Tender Touch 3), this is for the engine, however, is not a problem.
The stepless control of the head and / or base (individually or together) allowed me not only a relaxed sleep. Meanwhile I look rather remote in bed when on the couch. Read also works perfectly and even working with the notebook is not a problem.
I especially want to - even if it is not directly a product review is - highlight the customer service of the company Ravensberger mattresses.
There were problems with the delivery, the forwarder has repeatedly screwed up, so that delayed the appointment. In the first delay I wrote asking to see the seller a solution here on Amazon. Shortly thereafter, someone called me from the support and tried to solve the problem with me (Customer as I imagine it)
Now the forwarding has further screwed, which meant that the manager has the thing believed persölich. That will not be the normal behavior and I would not expect it, but it shows very clearly that the customer is taken seriously at Ravensberger.
Therefore: Unrestricted buy recommendation for the product. Through customer service I would give more stars if I could.