I've been using this nifty little speaker gadget for a little over two months now, and have been very happy with it.
It's a compact gadget that clips right on to your laptop screen, and has power and volume control buttons on one side, and a USB port and a 3.5 mm jack (to connect to external music players) on the other side. It comes with an 18 inch long USB cable, and a small carrying case that can house the gadget and the included USB cable. The gadget uses USB power from your laptop so there's no need for a separate power cord.
When first connected via USB, the speaker gadget loads a driver onto the computer automatically. The software installation process also automatically makes the Z205 the default speaker, but the simple manual configuration steps for doing so are listed in the included operations manual.
To compare the sound qualities from my Windows 7 laptops' (Toshiba and HP) built-in speakers and the Z205, I had to manually switch speaker configurations to make the speaker on test the default. I then restart my media application (e.g., Windows Media Player, etc) after each switch, turn the volume setting to maximum, and play one of the audio or video sample files that come included with Windows 7's Media Player installations (e.g., classical music, Wildlife in HD video, etc). The results were clear: the Z205 delivered better sound quality in all cases. The sounds from the Z205 were fuller, sharper, and richer; not BOSE-quality but still much much better than those coming from the laptops' built-in speakers.
Lightweight and compact, the Z205 can be conveniently packed for travel. The 3.5 mm jack for connecting to external music players is a very much appreciated bonus too!
Some reviewers have commented that this nifty little speaker gadget can really deliver very loud volume to fill a very large room, while others have opined that the maximum setting is not loud enough for them. My own experience agrees more with the latter: at maximum volume settings, the Z205 delivered sounds that, in my experience, were about 2-3 times louder than my laptops' built-in speakers but I still felt comfortable that the loudness level wasn't excessive. And although the Z205 doesn't deliver BOSE-level sound quality, it's still a considerable improvement over my laptops' built-in speakers.