Recently picked up a TS4K and the remote is so far it's best feature.
On the remote, there are buttons for shortcuts to the TiVo button, (TV) Guide, as well as others like power (TV Off), volume, channels up/down, etc.
Using an app in the Google Playstore called "Button Mapper" these buttons can easily be remapped to use Channels DVR. (Basiclly building your own Android TV to use with Channels DVR).
For example, also using the Channels DVR Beta app installed coupled with the installed the production version as well makes it very handy remapping the TiVo button to go to the DVR, and Guide button to go to the Channel DVR TV Guide.
You can also program then the 1-9 buttons on the bottom with shortcuts to other apps as well like Plex, Disney +, Playon, Etc.
Only button I couldnt reprogram that I wanted was "Live" TV button. And the Channels up/down buttons dont work with the Channels DVR app. Anyone that can get the channels up/down buttons to work in Channels DVR app, let me know.
Anyone that has a spouse, kids or visiting family members know that you need to make your TV setup as simple as possible. Can't think of a better way to do this than using the TS4K remote and remapping the buttons to work with Channels DVR.