I had purchased the single layer thick strapleather sandal 2 years ago, wore them pretty much every day all summer long (I was allowed to wear them to work), and just now, after 2 years, they started losing their padded support on the pressure points of my feet (heel and ball).  They are a very well made sandal and super comfortable.

This time I went ahead and got the double layer thin strap leather sandal because I want that extra arch support and padding, and I hope they will last longer than 2 years.  They had a minimal break in period - the straps were slightly snug and rubbed the inside of my feet a little raw the first time.  After that they were fine. I remember when I first bought the thick strap sandals, they were instantly comfortable - - - no break in period.

I love how they quickly mold to your feet, and the footbed is smooth and soft leather.  I prefer leather footbeds because they do not hold odors like synthetics do, and leather allows your feet to breathe.

I have taken many long walks in them already, and they are great at shock absorption and have a nice supportive arch.

The one semi-negative thing I can think of to say is that the sizing is difficult.  I normally wear a size 7.5-8 in any shoe, but in the Rainbow Sandal sizing chart, I found the Large (7.5-8.5) to be 3/4" too large.  I wish I would have ordered the next size down, although I really don't think it has affected the function of the sandal.  Only looks slightly too big for my feet.