I called customer support with these questions, and the answer I received was to try it and see what happens. GREAT support 
I have 2 questions:
1) Will friends and family work with blocked numbers? For example, someone calls me from a number which has caller id blocked. Will friends and family still work with this number when they call me? I'm presuming (maybe I shouldn't) that it will work when I call them.
2) I have call forwarding from my house to my cell phone (my house phone is with another provider). When the call is forwarded, the caller-id that shows on my cell phone is from the number where the call was placed. Will friends and family recognize this call as having come from the original number, or from my house?
Thanks.