I bought my NOCO from my local battery distributor. I wanted something that could work on light duty & medium duty trucks. It had to hold a charge, even it it wasn't used for months on end. And I wanted to be able to return it ifitI didn't work. My distributor promised that he would honor the warranty if the product failed within a year. Of course, I also had to be honest about it if I didn't charge the device, and it did not have enough electricity to work. On a Friday night, my boss & I left all the headlights on, on every vehicle in our fleet. Then plugged in the charger to allow an overnight charge. On Saturday morning, we came in and jump started every truck in our yard. I was a believer. The boss ordered a NOCO for every car & truck in the fleet.
At the time, the small lithium battery jump starters were still new to the marketplace. Only a few roadside assistance companies were willing to try them as an alternative to the old fashion jump packs. The battery distributor started out with about a half dozen brands, since all the reps were at his door trying to push their product. The distributor said that he would only carry the NOCO, because all the other brands he tried kept getting returned. Number 1 complaint was that they didn't work.
I suppose if you have a tow truck, you need a device that works, 100%, all the time, and on big & small cars.
A private person isn't jump starting 25 cars a day, with some of those cars being big trucks. But you should still expect it to work, 100% of the time, all the time.