What is is 4 miles in 30 minutes good?

Okay, here's an evaluation of running 4 miles in 30 minutes, formatted as requested:

Running 4 miles in 30 minutes equates to a pace of 7 minutes and 30 seconds per mile. Whether this is considered "good" depends on several factors, most importantly your individual fitness level and goals.

In summary, whether 4 miles in 30 minutes is "good" is subjective and relative to your individual circumstances. However, as a general guideline, it represents a solid level of fitness.