I had my interview at the Dallas DO today May 14th. It went very well. I was very nervous about my extensive travel over the past 5 years. I had some 800 odd days of travel that included trips to a lot of countries in the world. But none of my trips was over 6 months, the maximum trip length was 110 days. I was working for a US company as a contractor and did have a letter from the company for the reason for the numerous visits.
I had my interview today in downtown miami. The entire process took just less than an hour of which around 45 min was the wait for my turn. I had taken so much with me but nothing was needed except the passport and green card. I did get one unusual question related to my mailing address. I have always used a P.O Box as a mailing address so she just asked why P.O Box, why not use the home address. I just told her I change residences quite often ( am a single guy ) and its just easy for me to get a P.O Box near work.
The service provided by Art Shiflet and Mathew Chacko from Mr.Khanna's office during my citizenship process was exceptional. They both provided me prompt answers to my inquiries, updated me with information as soon as they became available and were extremely knowledgeable . I would highly recommend Mr.Khanna's office for any sort of immigration cases