Everyone who watches Martin knows he has certain pet peeves regarding multimeter functionality.
One of mine is overshoot. When I see a multimeter overshoot dramatically, I automatically distrust it. So at 31:28 (part 2) when the UT71D shows 455.7V AC on mains, I'm already never going to use that multimeter on anything high voltage.
Now everyone knows that it can't be right when connected to mains (only 240V AC), but what if I'm an electrician who works on "unknown" equipment/scenarios? What if the multimeter first shows 800V AC and then settles to 400V AC? Which one is right? Can it possibly be 800V for a brief moment?
PS. The Fluke 17B overshoots. I'm sure Martin will discover that when he reviews it. Not by chance, I'm not an owner of the Fluke 15B or 17B.
See 2:22 into this video (Fluke 17B shows 6.83V first then 4.99V for a 5.0V reference).
http://www.youtube.com/watch?v=3y5wjaNusr0PPS. I also noticed that Fluke multimeters that use Vchek like the Fluke 12 and 113 (just two examples) overshoot slightly. For example, if the correct reading is 5.0V, the two above mentioned will show 5.02V and then 5.0V next.