Hi Kerner,
Yes! Heaven and Earth Designs are gorgeous and you do cross stitch OVER ONE square with one strand of floss. I am presently working on HAED's "Sacred Hour" and "Loves Me Not" patterns and the patterns are SOO detailed, that the pictures are magnificent.
In fact, HAED website is having an Easter sale going on now.
I DO use a stand Magnifier with LED lighting to do these patterns to see the linen "squares" easier.