Feng is reliable and patient. He is willing to spend his personal time to explain visa information. I would recommend Feng to whom would like to apply for visas.
Each visa has its particular purpose, apply a right visa for your purpose of travel/stay is important and will affect your future visa options. Every visa applicant is unique that you should not apply a visa just because someone else was approved that kind of visa. Everyone should consult a visa professional in advance to make sure of applying the correct visa.