Used the roku to break away from cable and cut costs. Happy that we did. I like the usb model for its portability. Set up is easy, but depending on how many channels you want to set up/link it can take a while. I do wish the transitions were quicker, it takes a while for the home screen to load and when rewinding or fast forwarding there is a lag when the content comes back up. Although I'm not sure if this is associated with roku or with specific channels.
I found the installing of the ROKU very easy, unlike others that I tried. I seem to be having a problem requesting Amazon Prime for movies, they show prices and I have Prime. But the east of using Netflix is fantastic and the control stick is the best.
I have an older Roku XD that I have used for years. I bought the Roku Stick recently to use with a new HD TV and I'm very happy with how it works. Speed, picture quality, and all the many channels available are certainly a great value at the price for the stick.