Needed an enclosed shoe (vs flip flops) for yacht/trek adventure on the Amazon River.  These are awesome.  Granted, have only worn them around home to break in, however, they need no breaking in.  I have a naturally wide foot, plus bunions and these are plenty wide.  Yes, I up sized one size (6 to 7) to be sure they were roomy.  Comfortable even without socks.  I get what people say about a kinda scratchy spot, but after a couple minutes you don't notice it at all.  And, there is no seam on the bunion, yea!  There is enough depth to slip in an arch support, I did.  Flimsy-no, light weight-yes . . . they're a water shoe, not hiking boot.  I love them & know they will be perfect:)