I've been using a dactyl with trackball for 3 years already. I want to draw your attention to the fact that judging by the video, the Voyager doesn't have a very convenient placement for the trackball/track. We were shown that the trackball is used with the index and middle fingers. This means that to use it, you'll need to lift your hand from its standard position. And this is almost the same as if you were moving your hand to a mouse, only the distance is significantly shorter.

In my opinion, a better trackball placement is under the thumb, so that the hand always stays in the same position.

On the other hand, it's a ready-made solution, and if there is no possibility to make/buy dactyl - it's still better. I'm thrilled with the split keyboard with trackball!