Summary: Great sound for such a small unit. The cord is a little short, but not too bad. You could purchase an extension for a couple bucks elsewhere if it was really a problem. Otherwise I really enjoy this in a small apartment where I can't have it turned up to 11 anyway. Very good for watching movies or music for the entire room.
Summary: Works well on a laptop that did not have a loud enough speaker. This was low-priced relatively speaking, and have used it for a couple months without problems. No controls or adjustments on the speaker, use your PC volume controls to adjust. I would say the sounds are roughly twice as loud as my laptop PC speaker, which helps while it may not be loud enough for some (if you are looking for real loud or high amplification - this is not a good choice for you).
Summary: I realize a lot of people are bashing this speaker for not being a wireless/rechargeable device. This speaker, however, is perfect for me. I needed a device that used a reliable source of power that would not diminish over time. Secondly, I needed the device to have excellent & audible sound quality from a nearby or far away (50ft) distance. The Z50 met these needs while set at an affordable price. Five stars.