My mom has a Roku Select 55 inch TV and a Roku Streambar that's connected to it. She uses a Roku Voice Remote, but what messes her up is the volume button on the side of the remote.
I wish Roku would make a remote with a large volume control on the front of the remote. I'm guessing this would sell great, because many people who are older buy the Roku TV because it's an easier smart tv environment and many kids are buying these TVs for their parents for the same reason.