I purchased a S3 Samsung watch just over 2 years ago. It has had a very easy life on my arm! There was a problem with it so it was sent back to Samsung and a 'technician' said the main board is faulty and will cost nearly £140 pounds to repair...obviously more than it's worth! I would say that if the main board on a watch should be lasting a lot more than 2 years. If it doesnt then it is a fault of Samsung, as clearly it must be substandard. I now have a worthless watch after only 2 years. If they cannot last there is no point on buying one! Customer service initially did not even reply to me...never a good sign.