I really didn't know what to expect when I bought my Roku. I found that it's opened a whole new world of entertainment for me. I've cut the cord and no longer have cable and am using my Roku as my total link into my entertainment channels.
Barely use it, our wifi is at the other end of the house and the roku barely picks it up, meanwhile the wireless on the wii works just fine in the same location...the remote constantly sticks, so when you push up it will scroll through everything, same for down...not very happy with it in general.
The stick is convenient in that it plugs into an HDMI slot and does not require a separate power supply. It does everything the bigger and more expensive Roku boxes.