So the ROKU arrived today. I would say it took me a total of maybe 40 minutes between unpacking it and streaming Netflix movies to my TV. That includes things like reviving my dormant Netflix account. (They gave me a free month for returning!) Pretty easy stuff, but I admit I consider myself to be tech savvy. Only real glitch was when I forgot the password to my wireless router.
For now I still have the DirecTV and the ROKU connected. The akward part is switching RCA style video connectors back and forth between the DirecTV box and the ROKU box. But this will go away when I switch off DirecTV.