I'm using two Hopper Slings.
I'm using two Hopper/Slings also, and I just tested watching a recording on one DVR from the other one. Unlike previously, it now works exactly as it should, pausing and continuing the recording normally, and pressing "Stop" brings up the "Resume/Delete/Start Over/DVR/Live TV" screen. Selecting "Live TV" did exactly what it said. I don't expect pushing the "Stop" button a second time to do anything at that point. Pressing "Play" resumes the playback as expected. Pressing "Pause" freezes the playback, and pressing it again restarts it, as does pressing "Play". The 30 second jump ahead and 10 second jump back are also working correctly across DVR's now. As far as I've seen so far, U703 has fixed all of the previous cross-DVR issues, with the controls working the same regardless of which DVR has the recording on it. If you're still having problems, the only thing I can suggest is making sure both HWS have updated to U703. I don't know how well it works if only one of the two has updated, since I didn't test that situation.