My Fionna shoes are massively uncomfortable. Between the blister forming on the front of my foot, the half inch dent on my Achilles tendon, and the padding that is basically equivalent to walking barefoot, I am becoming quite grumpy.
But I got 3 ft from Kevin Bacon, 6 ft from the cast of Supernatural, met Grant Imahara, and brushed against Felicia Day. So the tradeoffs are worth it I suppose. =)