After 3 years of endless treatment at Germany, there was no substantial improvement. I went to Israel to do a post-doc and went to Dr. Dayan, which is very near by Tel-Aviv University.
After only 1 year of treatment I was done. I was surprised that an Israeli orthodontist was better than a German one. Moreover the prices seems cheaper in Israel than in Germany.
P.S:
1. She has native tongue English
2. I saw other pleased patients who got Invisalign and lingual braces