A big advantage is the monitoring of individual shafts. Thus not only different types, but there are different charge states can be considered simultaneously. The extended quite the battery life.
The unloading is in principle the same with the store, but so far I could not determine a way to enable the discharge individually for a shaft. A slight disadvantage. (The manual describes this is not clear.)
The LCD display is nice, but does not provide a clear advantage. The only added value is the display by the indicated fill level of the batteries. So it can be estimated, which will take time charging more to complete.
Overall, an excellent price / performance ratio and a recommendable device.