I definitely what youd consider short (my twin sister is taller than me :p )
But I personally wouldnt get those shoes. Id love it if they could permanently increase my height, but I think Id feel embarassed to do it temporarily. Im one height around friends and then all of a sudden, shorter when barefoot. I think for me, itd just draw attention to my lack of height.
Ill just settle for how I am :p (Though in crowds like at concerts or clubs, its very annoying having to stare at peoples backs and shoulders!! haha)