[essential]

My Harmony 900 worked with the Shield directly for U/D/L/R/Back/Play/Pause/Stop/FF/RR/Select right off the bat (manually mapped each to buttons in the customize buttons setup, used Shield as a Media PC). It seems very responsive, there is little to any delay that I can tell, slight at most. I'm only using Flirc to control the things that couldn't be mapped directly to the Shield, so my "Shield" activity is a mix of direct to Shield controls and Flirc. I programmed Flirc to control ContectMenu, CodecInfo, Subtitles On/Off, Next Subtitle, all using extra unused buttons on my Harmony. My Harmony can also wake and put the Shield to sleep. When I change activities to my TV or Roku, it puts the Shield to sleep, and when I change activites back to the Shield it wakes it up. The Flirc seems as responsive to me as the direct Shield controls.