I have owned this stereo for over a year now, and I have never experienced a problem with it. Of course, I have not tried to use it with the batterys in it, so how long it lasts with batterys i do not know, but when it plays ipods and the radio, it is purely fantastic. amazing sound quality, with deep, resounding bass, which is weird for such small speakers. little interference on the radio sound quality, and at times, it is similar to listening to DAB. With even a thermometer which is included in the product, you can even see the temperature of your room which is useful when you think about it, especially when you want to know how hot it is in your room during the recent heatwave here! Never once experienced a problem with it, and with a mini battery in it, when there is a power-cut, there is none of the hassle of reprogramming radio pre-sets and the clock. Defiantly worth the money.