FitFlop Walkstar Sandals are comfortable but I don't think they did something for my backpain. I also don't think they have a trimming effect. But they are comfortable and I think it is better to wear these instead of a regular fitflop.

I give four stars because I have it in color blue and it makes my feet blue where the bands touch. Especially in between my toes. This is my second pair, I had it in tan/light beige before - they didn't do it.
I do reccomend these sandals, at least some doctors put thought into it.