I really love this place and in my main saved game, Sulani is my go to vacationing world for my Sims. I also have 2 families living there, the Calientes and the pre-mades with the old woman and her grandchild. I do keep 2 rental lots in Sulani, one for big families/household and the other for single Sims and smaller families/household.
I put down a restaurant in this world too and I did a slight modification of the bar, to include a second story with a library/local community area for the locals. The restaurant also has a second story with a few skilling stations. With these two community lots, my locals have just about everything they need and rarely need to seek into other neighborhoods.
With the mermaids, this pack is truly 10 out of 10 for me.