Generally yes. Depends on how bad you let it get before you stop. Estrogen levels do usually return to normal after you stop. All my estrogen related side effects immediately went away within 7 days of stopping Propecia. If you are overweight and allow yourself to grow breasts before stopping, you may need surgical treatment. But avoiding that is simple. Pay attention to your body, get an estrogen level test if you're concerned, and take the appropriate action at that time.
Again we're talking like 1% of people here. 10 people out of every 10,000 people have this problem.