Another pocket pro II user here.

I do think that one has to be careful when using a timer and mindful of the goals. If your goal is self-defense oriented shooting then you need to be careful not to get obsessed with beating the clock.

One thing that we're going to do at my rifle match this month is run the exact same basic course of fire twice; once reloading the carbine and once transitioning. I think this is a good use of the timer as you can use it to illustrate which method is actually faster.