I have two of these and I also have the previous versions.
All I can say is that these tiny suckers rock!

They are so loud, tiny size, battery lasts for 10 hours for sure (even more when using low volume). The cable is the perfect size, if you want a longer one, you can use the provided usb cable which also has audio cable attached. You can also connect an unlimited amount of speakers to each other to raise the volume to insane levels. Get your friends to buy them and connect them. Its quite an experience.

The one bad thing is that you can put the usb cable in one unit and charge two units at a time. You need separate usb cables connected to each of them, if you say, want to use a couple as computer speakers.

Also, the base is so powerful that the speakers actually moves around a little bit. But I guess I can't complain about that

There is no substitutes for these. My rating. 9/10.