I have owned this desktop computer for a little over two years now, and overall, it has performed well. I've found that the dual-core processor and 2GB of RAM have been sufficient to run every-day applications at good speeds. The total hard drive space of 1TB is more than enough for storing videos, music, photos, games etc. It is also fairly quiet, even when running intense applications, but I have found that the DVD drive can get rather noisy at times. The large number of USB ports, as well as the plethora of memory card readers mean that it is easy to connect up peripherals.
My primary criticism of this computer would be the supplied graphics card, (the Nvidia GeForce 8400GT) which I have recently replaced. It is perfectly fine for things like watching movies and browsing the web, but it struggles when it comes to gaming. While it is capable of running older games, such as half life 2, at high resolution without lag, it is not able to cope with more recent titles. Games such as Bioshock, Call of Duty 4 and Fallout 3 will all suffer from low frame rates if running on anything other than the lowest settings.
Another criticism would be the size of the power supply unit. The supplied PSU is only 250W, and if you're going to be adding or upgrading components, you will need to buy a bigger power supply.
On the whole this is a very good computer if you're not going to be playing the more demanding video games out there. If you are, then either look for a more appropriate machine, or be prepared to spend money on better components.