I only had a Premier XL4 and an the Tivo iPad app setup. I could not stream to the Tivo iPad app from the Premier XL4. That function was not available in the Tivio iPad app. I then went out and bought a Roamio Pro. I now have my Premier and Roamio setup to transfer between devices. Everything is working correctly. I then open my Tivo app and I am now able to stream from both the Premier and Roamio. Why is the Premier XL4 suddenly able to stream to the Tivo iPad app? I specifically select the Premier in the Tivo app and select a show to watch and streaming works perfect. I thought the Premier XL4 would need the Tivo Stream.