I love mine.
They are my work shoes, my park shoes, my slippers. I don't run in them though.
However, I always have to break mine in also. It takes me at least 1 month. I hate a new pair of birkis--they feel like someone strapped a board to the bottom of my foot to me!
Honestly, there are so many different kinds of footbeds that I think you have to try on (JMO) There is one that is good for high arches that make me feel like I am standing on a tennis ball. Ick!
I wear the original footbed. But there are several other kinds too. I tried on one this spring that was entirely different that was as comfortable as anything that I don't believe I'd have to break in at all.
There is real leather and a man made leather called birkibuc (or something like that) I have both kinds and prefer the leather for the comfort and softness as I break them in although the man-made kind looks better/newer longer. I just don't think it conforms to your foot like leather (I'm talking straps here--not footbeds)
So there you have it...several opinions on Birkis. LOL And I agree--people love'em or hate'em. And like Blondie said above about the looks of them, well, you may not even like the look of them.