Only two minimum disadvantages:
- The opening of the charging station can not be completely airtight seal when reinsteckt the pen, this may lead to evaporation of the liquid and non-achievement of the possible 20 boots (It kannn be the brand's "Staedtler" pins fit perfectly into the station )
- I have a feeling, when wiping the writing is now a little bit smeared on the blackboard
Nevertheless, fully satisfied, at this rate for 20 recharges I give five stars.