North America Immigration Law Group provided a very professional and around-the-clock service that allowed me to get my I-140 (EB-2 NIW) application approved in less than 6 months since initial submission. We worked on my application between October and mid January 2019: I was quite quick in providing them with the required information at each step, and they were very responsive (they always met their self-imposed deadlines). In July 2019 I received confirmation that I-140 application was approved with no issues (RFE, etc.). I will surely retain them for my I-485 application as well.