A flip is a frustrating pattern. It's usually accompanied by the following symptoms

• It robs distance.
• It causes fat and thin shots.
• It causes an outside in path.
• It can cause toe hits. 
• It can cause high weak shots

But, just because you have a flip doesn't mean you need to fix it today. If you want to maximize your performance with your flip, make sure you do it at the end of your rope. That means to focus on good arm extension and impact position so the flip happens as late as possible.