Well, the 2 buses that I travelled were okay. The drivers were from Zagreb (going to Venice) on one bus, poorly in any other langauage than theirs. The other bus, italian driver, too fast for any other human.
My only real problem is that they don't have indicators on the street with bus stop sign, or anything that can help you guess where you go !
Tourists ask every other tourist, where is going, if is this the right bus stop.
If anyone from the company reads this, I kindly suggest to have some panels , indicators, written even only in italian about the bus that stops at the specific location with the approx. hour the bus would be there and a liitle map of the destinations this bus go.