PS - My first full length mat was an Alpkit job, which was returned with a faulty valve and replaced with another. Which also leaked. I threw it in the bin and bought another Thermarest.
I'm not saying all cheap mats, or even all Alpkit mats, are rubbish. One man's experience is a very narrow part of the whole picture. But my experience suggests you get what you pay for.
Oh, and a ridge-rest/inflatable mat combo is as as close as dammit to sleeping on a bed!