Expand your horizons!
The instrument rating is the most useful add on rating to your private pilot certificate. With an instrument rating, you'll learn to fly and navigate in clouds and low visibility. You'll learn to analyze weather patterns and make safe go/no-go decisions.
Your instrument training follows a 5 stage syllabus, with an emphasis on refining aircraft control, instrument approaches, navigation and cross country flying. You will get at least 40 hours of actual and simulated instrument time with a CFII.