I am looking for a review or opinion from someone who has used a "self inking" cell dotter.

I am considering purchasing one for my microscope to mark my specimens.

I’ve found some cell dotters online by google-ing "CELL DOTTER", but I wanted to get some feedback from people who have used them before I go ahead with my purchase. I wanted to know specifically if these units work well enough for high volume use.

Thanks in advance.

BK