The most telling thing about that Sawzall is the low vibration. If you get hold of that saw and another recip from some other manufacturer. Hang one down off each hand arms down by your side and fire them up, then get someone to place a hand on each of your shoulder blades. It is amazing to feel how much vibration runs up each arm. With a blindfold test you would know immediately which has the lowest vibration by a big margin.
Oh sorry I have just seen the video is about cordless chain saws. Doh!