Hehe, I did go there two weeks ago and it was great
The week started off with jugo, and with that direction Neretva didn't work at all - had only 9kt. At the same time the wind meter in Viganj was showing up to 17kt, but I didn't get a chance to go there.
Then mistral came back and for 3 days we had 13-16kt starting at 3-4pm and continuing until the sunset. Everyone (30+ kites) stayed at the main spot. I'm guessing Kaikala beach on the other end has less wind. I measured those 13-16kt with my Sleipnir and at the same time the wind meter in Viganj was showing about as much - so it seems in mistral both Neretva and Viganj get as much wind. The Ploce wind station wasn't representative of Neretva at all.
The spot itself is very nice too. Awesome views with the mountains in the background
Big shallow area with flat water, although that part was always so crowded, I had to cruise in with my kite at zenith. So normally I stayed away from the crowd, on the open , deep water - but even there it wasn't very choppy at all.
One negative thing is the motorboat support. They always chase you to pay 50kn before launching, which would be fair if it gave any support. But on the last day 4 kites went down outside of the shallow water as the wind suddenly died. One of them was my buddy's. It took the boat guy over 20 minutes to even get into the boat after it was clear they can't get their kites up. Then it took him forever to fish them out, already almost at the other end of the bay, as they were drifting for 30-40 minutes at that point. The beach house had no radio contact with the boat, so if some serious emergency happened when the boat is far out, they would have no way to let the guy know. They never even fished my buddy out (run out of space in the boat?), and after drifting 50 minutes he got to the opposite shore, where we picked him up by car. So yea.
In any case I had 3 nice sessions, so that's great