I have used Mr. Hien twice for a total of approximately 3 weeks. I can highly reccommend him. He is an independent guide approved by VNAT. I cannot quote a price for just driver service since I used him to make all my VN travel arrangements. His price for hotels and travel was very inexpensive. He usually responds promptly to email. You may email him at "[email protected]". If I can answer any questions regarding him in the future, feel free to PM me.