I found Chen immigration law group very professional and super helpful for my EB1A I140 petition. They always maintain high standard in terms of preparing a case by providing excellent quality petition/recommendation letters. They are prompt in responding to queries and very accurate in providing letters and filing the case before deadline. They are also superb for making write strategies for getting approval done. I talked to few other law firms before hiring them. I am happy that I have taken the right decision and thanks to my attorney and Chen associates for their service. They are the best for GC application.