I bought these as a fluke to have something that was easy to use to go through airport security with and hoping they would be comfortable enough and not suffer foot pain.  Essentially influenced by the Crocs and New Balance clogs which both are much more expensive.  I have very flat feet and unless I use my running schools, most others give me some type of foot pain or shin splints when I am walking briskly on hard surfaces for extended periods.  I hate slipping laced shoes on and off through airport security especially when in a rush.  This foam that is suppose to mold to your feet definitely does.  I now have two pair and now my 'official' travel shoe.

I am not sure how long they will ultimately last but so far so good.  After a couple months of heavy use the foam seems to have compressed to my feet so they are less spongy feeling but I still don't have any feet issues through the airports.  They are definitely not as heavy made as Crocs or the US made Garden Sloggers (no vent holes).  But for the cost I can't complain and I  can get two of these pairs to one pair of Crocs.

When it comes to sizing one needs to think of them as sandals not high end leather dress shoes.  I am a 9.5 but I float a little in a 9, but if I change to athletic socks it is tolerable but not perfect. I am not going to be able to break into a sprint without probably some miscue.  But even with this misfit, the comfort is still there and why my rating.  Finally I am not sure if some of my success them is that I weigh about 155 lbs.