ATSC tuner works well, much better than HR20-100 OTA, just need signal strength capability. Media share works though I am trouble shooting a problem with Windows Home Server where it times out or has authorization issues. Noticed the substantial slowdown in system menus and guide. I had one instance where I lost the video on satellite and OTA, audio was still working and I could change channels but had a blank television. Powered the H21 off and on, didn't make any difference so I did a RBR which cleared the problem. Waiting for MRV to see the power of a HR20/21 DVR and H21.