I complained again about the slowness of my HR20-700 and here's the solutions they gave me:
So, 1 basically says not to use the DRV as DVR; 2 and 3 say that they know they put some functions in the receivers that makes them run slow so I should disable them. Why aren't they disabled by default or removed altogether?
Again on suggestion 1, I had to replace my receiver few weeks ago and with now shows in the playlist and no SL it was quite fast. As soon as I have added 2 SL it slowed down to a crawl. So it might be true that SL cause the slowness just the solution given is idiotic.
The number of Series Links seems to have absolutely no adverse effect on the HRs. Several of my 12 HRs have 50 SLs and, except for the problems caused by the HD GUI, I see no problems with my HRs whether they have twenty or fifty SLs. I don't have any 21 series HRs except for a rarely used 21-200, and I wouldn't have another 21 in my home under any circumstances. I'd rather buy my replacements on eBay or CL.