It will save you a lot of time. Make sure you have no more than 65 characters per line. That way, most people will be able to read it using a standard email program. Put in an appropriate amount of whitespace. Your ezine does not need fancy graphics or colors.
Content is the key.
If you use the ezine-z template, you will have an ezine skeleton, which will include, for example, subscription information. Briefly summarize each article. Tell your readers what the next issue will contain. The articles themselves. Be sure to put the author's resource box or byline at the end.