Here are some things to think about when you're evaluating any peripheral device:
A printer produces a paper copy of documents you create with your computer. Some are designed exclusively for printing text; others are especially good for illustrations and can even print in color.
Decide what's important to you and look for a printer that meets your needs.
The single most important consideration in choosing a printer is compatibility with your software. You want to be able to choose the Print command from the menu without worrying about whether your printer will know how to interpret the bits that come streaming out the printer port and down the cable. Most applications designed for the Apple II work automatically with the ImageWriter, the ImageWriter II, and printers advertised as being compatible with the ImageWriter.
Graphics-based applications, and some word processing programs are graphics-based, usually require a dot matrix printer. Make sure you get a printer that works with your applications.