I used Thai Visa Centre to get a one year volunteer visa. All of the process was very smooth, registered at the center in minutes, the agent Angie was very helpful. Answered all questions and provided me with a time line for when my passport would be ready. The estimated time was 1-2 weeks and I received back via their own courier service in around 7 working days. Very happy with the price and the service and will use again. I highly recommend anyone needing a long term visa to check out Thai Visa Centre, the best service I have used in ten years here.