OK, here goes. The ReplayTV box has two guides, the first is a guide to the shows recorded on the harddrive, the second is the channel guide. So, when you want to record a show, you don't have to set it up VCR style (ie, record channel 5 at 8pm for 1 hour), you simply pick the show from the channel guide and set it up from there. If it's a regular show, you can set the recording to happen every time the show airs in that timeslot, perfect for weekly shows.
If the show airs in all sorts of different timeslots, which is not unusual with syndicated shows, you can set up a theme channel which will catch all of them.
If you want to catch shows by your favorite actor or director, etc you can set up a theme for that too. For example, you could say "record all shows with Clint Eastwood", that sort of thing.
You still have the option of doing VCR style recordings too, when needed, which can be useful for channels that don't have guide information, such as the cable access channels.
As most cable systems have dropped their analog channels, you would need to use a STB to decode the channels for the Replay to be able to record them. The Replay comes with an IR blaster that can be programmed to send the necessary remote control signals so that when the unit wants to record a show from channel 5, it will first switch the STB to channel 5 and then it will start recording. With Comcast the process is even better because if you're using one of the DTAs (Digital Transport Adapters) there is a cable you can buy that connects the Replay directly to the DTA box. This cable is a homemade hackers cable, so it's perfectly inkeeping with the JP1 spirit. I have 3 of them and can confirm that they work with my Comcast DTA boxes.
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If you have a 5000 series unit, when you playback the recorded shows, you can select to skip commercials, so when a commercial break is reached in the recording, it will automatically skip to the beginning of the next segment. This works for about 70% of shows and when it works it's GREAT. And when it doesn't, you just skip the breaks manually. Unlike any other PVR, ReplayTV has a multi-minute skip, so when you skip manually you don't need to fast forward thru the ads, you can just press 3-skip and it will jump forward 3 minutes.
Let's say that you're watching a show with the family and you have to run out to do some errands, but they're going to keep watching. You would press DISPLAY and make a note of where you are in the show, then later when you want to watch the rest of it on your own, you can go directly to that point by entering the number of minutes and pressing JUMP (eg, press 120-JUMP and you'll go directly to the 2-hour point).
Let's say that you have bought multiple Replay units and have one by each television, you can stream shows from one unit to another. So, if there are multiple shows on at the same time that you want to watch, record one show on unit-1 and the other on unit-2, then watch them both back on either unit. If you have multiple Replays in the same location, you can program each of them to respond to a different unit code (and of course, you can JP1 your remote to send those different unit codes).
Let's say that I recorded a show that you missed, ask me for it and I'll send it to you via the net and it will show up in your Received folder.
Oh yeah, let's talk about Folders. You can set up as many folders as you need and then set the shows to go to the right folder, so you could have "his" and "hers" folders, or maybe "adults" and "kids", etc.
Are you a fan of movies? If so, you can select the "Now Showing" option from Replay Zones and it will list all the movies that are coming up. You can also narrow down the results to 4 star, 3 star, etc movies or even types of shows, etc.
Starting in 1999 when I got my first ReplayTV box (which was an RTV2020 unit) I have tried to convince people to get into using PVRs with very limited success, but for me, I couldn't live without it.