Works great, remember that the computer from which you use SCCM console to create deployment need to have the SCUP cert
I tried to download monthly updates to my Deployment Package. The attempt failed with Access Denied for all updates. It turned out that even my account is a local admin on the SCCM server I need to add it with Full rights to the source share (both NTFS and Share permissions) where my Deployment Package is located.
As soon as I added the account implicitly and granted rights to it SCCM successfully downloaded necessary updates to the Deployment package.