That was my first time to apply for Vietnam visa. I do not know much about E-visa process but on Visa-Vietnam.org it became very friendly to use this site.
Procedure is so simple like:
Give your basic information
Deposit 20$ of fee
After completing this you will get your visa conformation through email.
Take print of that conformation copy to show on airport.
On arrival at Vietnam pay $25 on Visa on arrival office and get your visa.
By passing through this simple procedure you are welcome to Vietnam.