I’ve worked with Viet Horizon Travel for a couple of years now; the service has been stellar.  They have booked both my personal travel and also business travel for groups of faculty members from my university in California.  What I really like about Vietnam Horizon is that they do not try to sell you what you don’t need, no high pressure and plenty of honesty and integrity.  Just this last trip to Vietnam (I am in Hanoi now), I used them to get a business visa on arrival.  It was a simple and painless process and saved me $85USD for a three (3) month visa (previously I applied for visas through the Vietnamese consulate in San Francisco).  I highly recommend this travel agency and appreciate the superior service and attention to detail provided by Tan and Neil.