We spent two days in Laguna Palace in the middle of August.
The location is excellent. The room we had was rather small (not enough wardrobe space to unpack) but clean and silent. Would be great to sleep there, but there was a huge problem with air conditioning, which simply did not work, or was too weak to cool down the (small !) room below 25 degrees (as shown on the AC control panel, I felt like is was more than that).
IT WAS WARM THERE IN THE ROOM, all the time. Given that it was a middle of hot summer, this was unaccptable. At the night we arrived I talked several times to the reception staff downstairs, wanted to be moved to another room, but they said the hotel is full, which was probably true.
Strangely, the lobby/reception area was comfortably chilled...
Next day I talked to the hotel manager, who told me that there was a thunder storm few days ago which destroyed a part of the AC machinery on the roof, and they still were not able to have it repaired. The damaged machinery was responsible for the AC in the rooms (I understood - all the rooms) in the hotel, while the lobby and breakfast room are served by another AC system, which remained untouched. The manager offered me 15% discount off the room price, which I accepted as I had no choice of moving elsewhere, and we did not want to spend time looking for another hotel for one night in overcrowded Grado.
I would probably remain believing that we just had bad luck and that this AC problem was a short time inconvenience, but after the return I found reviews of other travellers reporting exactly the same occurence already in July, so the AC disfunction either repeats or continues throughout the summer. Beware, you may not be sure that you will feel comfortable there in summer.
To supplement the report: the breakfasts are ok, although a bit disorganized, in a chilled room though :)
There is a underground parking there, for reasonable price, with a lift to the lobby and rooms, convenient.
All in all, good hotel, with absolutely unreliable air conditioning. Will not get back there in summer.