There are many applications for taking screenshots, and Screenshot Taker is one of the most basic you will find.
After installation, you can either choose to capture a part or all of the screen, and once you've done that name the file and it'll be saved as a .JPG. There is nothing more to this tiny application. If you want to edit your screenshot, you'll have to use an image editor, and you can't easily capture specific windows.
If you're using a single monitor system, Screenshot Taker will work fine, but we had problems with a dual screen set up. It works by taking a capture of the whole screen, and if you want to take just a part you can. The image quality is OK, but not crystal clear, and you can't alter the quality of your .JPG capture, which is a shame. It also doesn't support hot key activation, which can be really useful when taking screen shots.
The idea of a super basic screenshot taker is a good one, but this is perhaps too basic, and there are other much better and just as easy to use capture applications available.
If all you want is a quick, no frills capture, Screenshot Taker will suit you, but overall it's not as useful as other applications of this type.