General saying the product is good but the designer may forget to put on/off switch on it. You could hear the sounds from amplifier and feel noisy if you always plug into usb slot when you don't use speaker. So I have to unplug it when not using and plug it when want to use. It's not very convenience.
Nice speakers. Loud enough for your room. Only minus is that you cannot control the water flow sensitivity. So in order to have a nice visual effect you need to have your music played in a certain volume (quite loud). Low volume, water will not jump. High volume, water will flow like crazy.