The Incognita has been angeschaft as a gift for my 12 year old son. The unit is very solid, can be adjusted well to the different eye distances, the operation is very simple and the optics are free of distortion and clear. All accessories are consistent and easy to change. My son loved it and the rest of the family as well. Certainly the stereomicroscope in professional use is a clear profit. Operation via the 230V plug it restricts but as a driving device for field trials. Otherwise, I would recommend it unreservedly continue, a good buy.