They give you no info about it until you are checking in, but they will not let you carry on the normal, standard carry-on suitcases that you can carry onto all normal Boeing aircraft (the regulation size that the flight attendants pull around).
You can only carry on kid-sized luggage. Your eight year-old's pink "hello kitty" suitcase will probably pass.
For the regulation-sized "carry-on" luggage, they will charge 50 euros each, each way.
Yes, theses are smaller, two-prop planes, but the point is that they should let people know about these restrictions BEFORE they buy the tickets.
And the flight attendants are impatient to the point of being rude.
Apparently, there is too little competition in this particular route.