I have had these speakers, since Christmas, and I love them.
They are Bluetooth speakers, so you can carry your phone around with you and still have the music playing. They have a great sound, and can go quite loud.
In addition, you can put the volume up on the speakers high, that way you can change the volume by using your phone.
It does come with an aux lead if you do not have Bluetooth, which is handy.
It is wireless as well. The battery does last quite a while, depending on how much you use it. But I haven't charged mine in a couple of weeks, and I use it every other day for a couple of hours.
It isn't very big, or bulky. Just a nice handy speaker with good sound.