I think you are going to find that most technicians prefer a test light over the Load Pro. I have one that I bought quite a few years back that gets no use.
Dan Sullivan is very smart, no doubt, but has done a great deal of shit talking and accusing large companies of infringement on his patent, and takes it personally when "influencers" do not like his tool, which hasn't helped his reputation.
The Load Pro works as described, but is large and cumbersome and doesn't accept banana jack accessories like alligator clamps or back probes. To be fair, most test lights also do not fit banana plug accessories without some modifications.
Also, the Load Pro requires the use of a meter, which on paper sounds like would be be a more accurate test method, but it's also two tools now you are lugging around or maneuvering under a dashboard.
It also has a fixed load, which may be too little for power supplies to large current consumers, where as with my test light, I have different bulbs I can use depending on the load I wish to put on the circuit. The demonstrations of the tool always begin with isolating the component and putting the Load Pro in the circuit as a substitute load, which can be easy or a nightmare depending on what you are checking. I do use my test light as a substitute load, but I usually like to start my testing with everything in the circuit so as to not disturb any possible intermittent connections that could pull the diag into the weeds.
If you have the tool, and you like it and its helping you fix cars, that is great. It's not a worthless tool, but I feel like I have better, easier to use tools in my kit to measure voltage drop.
"Ground cannot be checked with a 10mm socket"
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