They function as intended-- they give good coverage, warmth and coziness to little ones' feet, they look good on and they stay on when in use. And they look good after washing  I can't say I've observed any negatives so far. However, I can imagine if the floors aren't very clean, the popcorn tufts could pick up lint or debris and the buff color can eventually look dirty and grimey.  I'm sure a good laundering will take of all that. For the price and functionality, I think these are a worthwhile investment.