I followed the set up instructions including the port forwarding. When I tried to apply the port forwarding changes to my router (Netgear WGR614v8) it failed. I am able to watch the slingbox on my droid phone over 3g and when I am connected to my neighbors wi-fi. I am also able to watch my slingbox on my laptop on my network, have not tried it on another wi-fi.
Will this affect the performance of my slingbox remote viewing?
If you were able to connect to the Slingbox using your neighbors network, it means that the Remote Viewing feature is properly setup, same with the Droid device. Have you tested the connection using a different network away from home? If you have Internet Viewing issues, I recommend to check this article,