No, they aren't uncomfortable. They were more comfortable than many of my heels, to be honest.
Yes, they are heavy.
But the added weight helped keep me upright.
I was able to walk around all night, up and down stairs, as well as dance, with no trouble.
Old platform boots with the heels removed, and a wooden platform attached to the bottoms for added height.
Wire mesh (window screen, to be exact)
Ardex Feather Finish Cement
Craft foam sheets & faux leather (hot glued on) for the "armor"
*edit* I was just popping on before bed and saw a DD?? Holy cow, thank you so much :0 *dies of joy*