I first tried Den's Houji-Kukicha about a year ago and enjoyed it. Later I tried Hibiki's Houji Karigane but didn't care for it as much. Now I am giving Den's another try and I sill prefer it.
Its simplicity appeals to me. Add a heap of leave with some boiling water and lett it sit for a minute or two or three, whatever, and you have a cup of warm, roasted goodness. Nothing fancy but pleasurable.
If you are looking for a roasted kukicha, my advice is to go with Den's.