The quality of the mattress
The quality of the mattress seems to be very good, this experience is after only one week of having it, of course. I would like to emphasize a very good support of the DLX stuff, especially Jim, who guided me through all questions I had before buying the mattress. Since no show rooms are available these days, trying/feeling the mattress is impossible before actual buying it. He showed incredible patience and I'm grateful for this help because it made all the difference.