We had a great holiday in Bled - possibly the prettiest place in Europe. The Trst is a bit old-fashioned and feels as if it might be up for redevelopment, but the views are fabulous, the rooms were clean and comfortable, and the bathrooms well-stocked. The fridge didn't work. Breakfast is at the Hotel Park, a few steps away, and offers a fabulous choice.
There is a huge amount to do around Bled - lots of watery things, as well as a summer toboggan run and other activities.
A warning about the Air France flight - the ticket only allows you to take hand baggage - nowhere on the Expedia details did it say this so we were stung for £58 for our two suitcases in each direction. And anyway they never made the second flight on the way out, as the Ljubljana flight leaves from a very distant corner of Paris CDG Airport - be prepared for a 10-15 minute coach ride to Terminal 2G. By the number of cases being collected by porters when we arrived, the same thing had happened the day before.