I had the Xi3 installed today. I will answer all the questions I have seen on this box in the forums over the past several months right now. The box comes with an XR5v4 remote. This is a very nice remote, and they should include it with all of their X1 installs, but I know they make you pay for it. I haven't tried it myself, but the tech and customer support told me that this box uses a tuner from the XG1. It comes with an SD card, so you can pause and rewind live TV. There is no lag between this box and the XG1. The two boxes are in sync. There's no additional cost per month, it's the same rate as the Pace RNG150 companion. Finally, and probably the most important point, the box is way faster than the RNG150 and there is no lag. It's the same speed as the XG1. It has built-in RF capabilities too, so no need for an adapter. Based on my experience so far, I highly recommend it over the Pace companion box.
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