Is it unnecessary to use the word with comprehensive?

You're right, "comprehensive" already implies completeness, so using "with" before it is often redundant.

Here's why:

* Comprehensive means "including everything; covering or dealing with all aspects of something." It already encompasses the idea of being complete.

* "With" suggests adding something to what's already there.

For example:

* Instead of: "We have a comprehensive plan with all the necessary steps."

* Say: "We have a comprehensive plan that includes all the necessary steps."

However, there are a few cases where "with" might be appropriate:

* Emphasis: You might use "with" to emphasize the comprehensiveness, like "This is a comprehensive plan, with details covering every aspect."

* Specificity: If you're specifying what makes it comprehensive, "with" can be useful. For example, "This is a comprehensive analysis of the market, with data from multiple sources."

In most cases, "comprehensive" alone is sufficient and more concise.