EJS introduces fairly small amount of new syntax that one has to learn to become fully proficient. The syntax itself is easy to comprehend for anyone who is even somewhat familiar with JavaScript and CSS.

According to some benchmark tests, EJS is way faster than Jade or Haml.

Your html/text remains pretty much the same before and after rendering. EJS filters out and performs its functions on any occurrences of its own <%= %> tags in your template.

EJS uses all the JS jargon and logic, so if you're proficient in JS, you can use EJS right away.