Because in addition to the Arabica beans Robusta also share with there is, the coffee is very low in acidity, which I prefer. On a scale of 1 to 5, I would the strength at 4, more even schedule a bit about. These beans are not for mild drinkers! Even the coffee long (large cups) the taste is good and the strength yet, espresso is really a strong and pronounced espresso, you guessed it.
What my pros reviewer describes as "strange aftertaste", indicates the proportion in the Robusta beans. This is normal for robusta varieties, you have to like (and perhaps not deduct a star). But of course he is right, food is always a matter of taste.
Conclusion: good beans for those who like it more and acidity, and at a moderate price. Therefore 5 stars.