I bought these sandals because many reviews said that they didn't need any break in periods.  Wrong...at lease for me.  I needed a "water sandal" on the quick because I was offered a last minute deal leaving for Hawaii in 4 days.  So, since I read so many of these types of reviews I bought them.  They felt fine the day before I left (walking on carpet), but the next day when I was walking a great deal on the beach I was crippled.  The outside left strap left me unable to walk with them on.  The right & left shoes were not even as far as the straps were concerned, the left fitting further  up on my little toe.  So much for enjoying the lava strewn beaches.  I wouldn't say don't buy these shoes, but I would caution you to build in some time to break them in.