Our existing sheets were Egyptian Cotton 1,000 Thread count with which we were very pleased; however, we needed new sheets. I ran across the 1,200 thread count sheets, and we ordered them.
Our first reaction was: we couldn't believe how thick these sheets were. Before using, we washed the sheets and then put them on.
Normally, one or the other of us pulls the "tucked in sheets" out and the sheets end up going everywhere. Our second reaction was that, after a week, the sheets were still tucked in as when we first put them on. That greatly impressed both of us.
I can truthfully say that we are sold on the "higher thread count" sheets.