It works well enough (and the factory remote is so poor) that you could almost say its necessary for proper Denon operation. Although any Harmony will work, just get one that supports enough model memory, as some only hold like 5 devices.
If setting up a Harmony, select a AVR-3808CI as your receiver in the Harmony software, so that you can get all the extra discrete codes that are in the Harmony database for that model. Most of which will work for the 1909/789 as well giving you far more functionality than the original remote had.























In that post I linked above I give instructions for enabling Audyssey in Direct/Pure mode.
