Though I enjoyed the trip I would just like to point out a few things which might help others thinking of booking. The length of the trip states 8hrs(approx), I cannot see how this would ever be achieved. This is my experience.
I was picked up at 9am from Verudela Pula, there were already people on board. We then went to Medulin to pick up more. We left there just before 9.30. The first stop was at Bale, a 30 minute drive, yes the village was pretty, but am going to suggest this time might be better added to one of the main towns. We were there for around 40 minutes.
We then drove to Rovinj, arriving at 11. We were escorted by the guide into the main cafe area, stopping a few times en route to be given snippets of information, which unless you were standing very close to her, you probably wouldn't have caught much. It was not a microphone and ear piece tour. Once in this area, she gave a long talk, while we were standing in the sunshine. Because of the heat it was too long for some people, and it was only 25th May. The area she chose to stand had no shaded area at all. Then we moved off into the old town and the cobbled streets, on the way to the church. Some travellers decided they didn't have the energy for the walk and climb to the church so decided to break away and do their own thing. It was already 11.45 by this time, and most of it had been standing still, listening to the guide.
After the visit to the church there was free time until meeting back at the coach at 1.30.
It was then a 30minute drive into the countryside for lunch. Arriving Grzini at 2. Although it was a pleasant meal, I just think there was too much time given to this experience. Besides the 30 mins travelling, we were there 1hr 45mins, and then we had to travel to Porec which took another 45 mins. On google maps it says even by bus you could do the Rovinj to Porec journey in 50 minutes. I would have preferred having the extra travel time and time given to the set lunch, in one of the main towns. There was an abundance of restaurants in both towns, and you could easily have had a meal in an hour, giving yourself more time to explore and enjoy Rovinj and Porec.
By the time we got to Porec it was 4.30. There was quite a way to walk from the coach to the narrow streets of old town. Some people decided to sit it out at the bus station. For those who did make the walk, and listen to the guide, the decision at the end was whether to go to the basilica or explore the old town, when there should have been just enough time for a drink or ice cream. There certainly wasn't after hurrying around the basilica, clock watching, aware of the return walk ahead. We were only in Porec 1hr 30 mins, which is why I think too much time was given to driving to the village, and having lunch.
So, we set off at 6pm, arriving Medulin at 7. I got off at 7.20 (still having a 15 minute walk to my hotel room), and there were still others to get off later. So in my case from Verudela Pula the amount of time on the tour was 10hrs 20mins. I think the tour time should say 10-10.30 hrs approx, I can't see any occasion where it would be done in 8, as we had 30 mins less than advertised in Porec.
It was a very comfortable drive in the coach, the driver managed the country lanes very well, and was always prompt when getting back to the meeting points