I am happy to report that this was an amazing tour! It was a little more time in a bus than we would have liked but that was because we had to stop in Kotor to pick up tourists from a ship in port, and more so because of people dallying around at a rest stop. Was supposed to be a quick 10 minute stop but we were there for over half an hour waiting for stragglers. This gave us a bit less time at Lake Bled but this was completely on other travelers, not on the tour company.
Lake Bled was gorgeous and though we only had about an hour and a half there (which meant no time to take the boat to the island in the middle of the lake), it was still absolutely beautiful and worth the drive. We unfortunately had to wait again for stragglers who didn't listen to the return time for the meeting point.
We then drove to Ljubliana and my husband and I were absolutely in love with it! Everything was beautiful and walkable and there were so many little restaurants and shops to see, as well as of course the architecture. Our guide gave us a brief talk to let us know where things were and some key things to hit, then we had time on our own for a few hours. Hubby and I are foodies so went off the main area to a beautiful restaurant for an amazing lunch, then explored the old town on foot. Again we had to wait for other travelers (the same 4 people every time!), then headed back to Trieste.
The guide gave us a commentary throughout our drives which was amusing, but not excessively chatty which I liked.
Hope this helps!