When I first got these slippers, they were awesome.  So super comfortable and just the right amount of support on the inside of the shoe and the soul of the shoe.  I did order a 5-6 as I do usually wear size 6 and read the other reviews about these running big.  They do indeed run big but this is not too much of an issue.  Especially if you plan to wear the slippers with socks.  The biggest issue I am running into is that the fabric has bunched up at the heel on the right slipper.  The left slipper is totally fine so far.  I think this may be what some reviewers were referring to when they said that the acorn emblem bothered their heel.  I can see how it seems like it could be from the acorn but in fact I think it's just the way the fabric has bunched up.  It is impossible to smooth it out and frankly, it is driving me nuts.  It always feels as though I have a small pebble trapped in the heel of my shoe.  So annoying.  I really wanted to like these slippers and I do like them but for this one issue.