H1 transfer - visa stamping

[Helpmevisa]

Hi,

I came to US with company 'A'(consultancy) h1 ( visa vaildity till 2011).

Jun-2012 i got an end-client offer so i transfer my h1 to end-client(company 'B') -I-797 is valid till sep-2015.

End-client is US base 200 years old company (5.0 billing revene).

Now i plan to go to india for two week vacation on jan-2013 and plan to attend visa interview. Can you please any one know is will be problem to attend visa nowadays, what are all question i may expect since i transfer my H1?

Please advise.