I have brought this boat rockers 510 and its been more then 9months I haven't come across any problem , I had a problem od one side speaker not working which is quite Commone in all earphones are headphones but best thing about boAt product is you will get quick replacement they only came till my home door picked up the product and replaced me with a brand new now ! Talking about its sounds quality I have used many headphones but BoAt has some seriously good bass in them they are know for they quality speakers , I love them for there looks and style its modren with attractive color combinations , they fit perfectly surrounding ears no problem with it , once charged completely I would on Average get upto 6hrs of usage and I could easily have a Bluetooth range from my study table to room door which maybe around 8m , never faced issue with sounds quality are Bluetooth connection problem , another best thing is you can connect two devices at once its good option to have
I know there are better headphones in market but at this price of point you will not get any other product lile BoAt with there one year warranty and excellent customer service