I have the casecrown case
http://www.amazon.com/CaseCrown-Stan.../ref=pd_cp_e_1 which sure looks like the same thing to me. The case by itself weighs 5 oz. The front flap folds back very easily. With the cover folded back the whole package ends up being just about an inch thick. I just got the reader and case a few days ago, but I haven't noticed any problem holding it when I took it to work to read at lunchtime. At home, if I planned on sitting and reading for several hours, I think I'd slip the reader out of the case.
The case seems sturdy enough to protect the screen when I'm carrying it around in my bag, though I'm sure it's not bulletproof.