Having read all the problems in this forum, you might understand why I was a little nervous when my 921 arrived. Not wanting to run another line to the receiver (due to home theater install), I opted for the btand new DPP44 and separator. This new equipment confused the installers, but I patently explained the deal to them. Attached single line to 2nd input (as read here) and the 921 downloaded software. Although switch check was screwy (saw a SW64) seemed to work some. Not perfect...but wait! After overnight rest, switch check was perfect! OTA is OK and unit works great. Thanks to the great effforts of all you early implementors your efforts and experience really helped. Thanks also to dish depot for their great service.