“Dear Attorney Zhou,

Happy New Year!

For this approval, I deeply appreciate all your great helps.

Impressed by the very efficient and high-quality service you offered, I am considering retaining your company for my further I-485 filing. 

I hope to see a new booming year of your business!

Client”

NIW approved after RFE.  Original filing date April 2011.  RFE filed September 2011.  Approved on Dec. 22 and approval notice received right before the New Year.