I ordered my Rainbows with the highest expectations, and unfortunately did not properly break them in before wearing them on a day I did a lot of walking.  I wound up with a painful blister on the top of my foot from the straps.  According to my online research, it is strongly recommended that you break in these leather sandals by putting them in water and walking around with them until they dry (which is pretty quickly, since they are designed to be worn in/around the ocean.)  See this video: [...]  The first time I put them on, the straps did feel very tight, but not to the point that I thought they were the wrong size.

I like that the narrow strap design has more of a feminine look than the traditional sized straps, but I do wonder if they were what added to the blister-effect. Either way, I'm getting used to them now and they are definitely growing on me.