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My z-axis was quite wobbly before, so it definitely improved in that regard.
Zapper97NY in his Make also says that he sees an improvement.

You lose quite a bit of resolution in the z-axis due to the much lower steps per revolution, but i haven't seen any problems in the prints even with auto bed leveling.

The printer now runs much quieter, especially the terrible whining noise during homing is gone and also homing is much faster now.