Hi! I did this one through SR on the 12th and am still waiting for credit. I've heard this one takes a few days to credit but I am trying to be patient.
You have to download the program but that was easy enough. And I actually like it. I may keep it for a while.
I had the same problem, because there are about 600 houses with the same address as me, we all have separate unit numbers. What I did was add # xxxx after the nnnn street name rd, and then the stamps.com program changed my address to match the Post Office, and I was in. I haven't tried to use it yet as my printer is out of ink, but I will have to get that fixed this week and see if I can print any stamps before I cancel. I mail so few things it isn't worth keeping.