Does anyone use an OTA DVR? If so, which? And why that one?

I currently use a Channel Master DVR+. It's connected to one television. I initially chose it for the ease of use and cost. My mother is not very tech savvy. No issues for the past 2 yrs. The drawback is that recordings can only be watched on the TV to which is connected, which is the reason I'm considering changing.

I've considered the Channel Master Stream+, which is Android based. But we have already invested in Roku.

Anyone?