Setting Roku up for just using Netflix it annoyed me, because Roku would not activate without getting my Credit card details. I don't need a middle man between me and Netflix, I pay my own bills, but I do understand that for some people this would be much easier for them if they have lots of streaming bills to pay. Nonetheless, if I knew this was a requirement of purchase, I would not have purchased the Roku.
When it comes to its operation, the auto detect screen resolution failed and even manually using either 720 or 1080 I ended up with a screen too big for my 65" K4 screen. I wish I could correct this because I love the Netflix button on the remote.