A:AnswerI uses it's own adapter and the cord is about three feet long I think. I only unrolled mine about a foot or so. I plugged it into the surge protector next to my TV set.
A:AnswerThe answer depends on what features you think are most important. For price and WiFi range and performance I believe it is, but I can not speak to how it stacks up in other areas such as picture and HDR.
A:AnswerThat entirely depends on the streaming application you are subscribed to. Most live TV apps have a DVR such as YouTube TV, Sling TV, and Fubo TV.