Just an update for evryone about NIW eb-2 I-140 application. We applied Oct 2nd 2021,and on Feb 23 2022 it has been successfully approved by US. So, it does work. You just have to explain how it will benefit USA. Did not use any immigration lawyers. Did everything on our own. Attached only 2 reference letters, however, I guess would be better to attach more.My partner was an applicant: 10,000 hrs, Bachelor's Degree from France, French Airforce ATC license, currently apployed with Canadian Airline Westjet. Good luck to everyone and don't spend thousands of $$ on immigration lawyers.