RFE received at USCIS

My RFE was recd on the Dec 13th.got a note that they would begin working on my case again.It says that they will mail me a decision or notify me if they need something from me.I have already upgraded my case to PP. Pl let me know if it means a good or bad news.

It means nothing as of now. Just wait for the decision to be updated by USCIS.