Many a time I've walked into a tool shop and seen a Kapex and could never figure out how to pull the head down. Until now.
And like the guy in the video, didn't find the wrist position the most ergonomically friendly.
Whilst it is similar to my Makita LS1013 in that the grip handle is vertical. It differs on the set angle.
The Kapex handle is set much higher throwing the wrist forward to gain grip. Then the button and trigger have to be pressed simultaneously. I think this guy makes a good point.
With my Makita only a lever is pressed to lower the head which is located close to the index finger.
(right hand usage)
I know it comes down to what you are used to also. Personally I prefer the vertical handle.
I know people who have LS1013's for many years and find using a horizontal handle weird.