I purchased a 10 inch mattress.  This mattress is not 10" in height.  Its more like 9.  I know that's only an inch but I expected to get what was advertised.  As for edge control the sides of the mattress appear to be sagging a little already and I've only had it for two weeks.  As for the comfort of this mattress its very nice.  I can say you have delivered on comfort and support.