To use it, you simply hit the down button on the remote twice while watching live TV, and from that point forward the DVR will buffer live TV on two channels instead of one. (The feature turns itself off after two hours.) We particularly like the ability to pause one channel, switch to the other and find the video automatically resuming from where we left off.
This is a definite deal breaker for some -- you can't use a universal remote or home automation controller to control the player while watching Blu-ray discs.
The technology also was used to pause a movie on a Windows tablet and then send it to an Xbox to continue watching -- and as a way to use a smartphone as a remote control.