I would rate 5 the trip, but there was one weak point - pick-up.
We were told that the bus would take us 6.20 am., at 6.30 we started to get nervous and tried to call head office, no one was answering. Finally 6:45 someone picked up the phone and said that there is a problem with the bus and another one was coming. 7:10 bus arrived.
One sms/e-mail sent from headquarter would solve the problem. I would suggest to inform participants upfront if somothing wrong is going on.
Generally, after this incident, the trip was great, we even have a polish spreaking guide, it was very nice surprise for us.
Katarzyna S., Poland
On excursion: One Day Boat Tour to Venice from Poreč