As far as performance goes, I would be wrong to criticise them but there is a major problem with them when it comes to re charging, THEY DONT SIT IN THE CHARGER PROPERLY, I have to have the left ear piece sitting on the edge of the charger unit so that the contacts on the right ear piece make contact with the charging points/I am glad that I didnt pay the full price for them because I would have been furious instead of just pissed off with them. They squeak too. I looked at a few other similar products but the review videos really sold me on this one. I was angry because I would have to return them, but my son thought the white was "pretty cool", so I let him keep them. In a week they started fraying at the white seams (I just cut it off with small scissors so you no longer can see it). These work almost perfectly for needs, I use them for pink noise (a touch more bass than white noise) in the bedroom - one on either side of the room. It was a bit smaller from heel to toe than the size chart said here, but my son was able to fit in them. I definitely think its worth a buy and I havent had much issue with a renewed product. highly recommend nice casual fashion to wear to work with leggings ! I BELIEVE THESE WOULD FIT A CHILD 18 MONTHS TO 4 OR 5 YEARS.