There are a lot of skeleton watches that I really don't like as for me they fail in the most important thing for which they exist they just make telling the time a pain. This however is not in that category and you can still see the time as well as the be...
I believe that is due to the difference in designing a movement specifically to be openworked, versus taking an existing movement and figuring out how to skeletonize it. I think Parmigiani has done it best.