I always used shavings and if on a concrete base then a layer of sawdust underneath. I like the look of a bedmax bed, but got annoyed as the flakes didn't fall through the fork as they were so big (maybe I'm just too cheap and should forget about the 5 extra flakes lost!)
I first started out on Easibed and hated it, I quickly progressed to shavings. Aubiose looks nice in the pictures with the foal lying on it but I not had to muck it out.....