It was a very good experience working with Rajiv, whose office handled my green card application under Outstanding Researcher category. They did an excellent job in a very timely manner, and I got my I-140 followed by I-485 approval all within two and half years from LIN center. Thanks a lot to Diane, Prerna, and Suman.
I highly recommend them to anyone looking for immigration related services without any reservation.
A note: Prior to Rajiv I worked with a lawer representing my company and wasted lot of time.