Chen Immigration Group helped me with my EB1A petition (approved May, 2019), and it was an extremely pleasant experience throughout the whole process. They showed the utmost patience and great attention to details in preparing my case, and their expertise in what evidence to present and how to present them is unsurpassable. They also have a great portal where various resources/guides can be found, documents are uploaded and organized, and communications are effectively done -- almost all the messages I left were responded within 24hrs, with a few exceptions within 48hrs. My family and I are truly grateful for the help and expertise from Chen group, and will definitely recommend their service without any reservation.