Perfect and well maintained spot in Piran. Close to the tip of the peninsula, so either way after a few steps you can jump into the warm clear water.
Nice little appartment with everything you need (maybe a coffee machine and little microwave/oven could be added). Several cafes, bars and restaurants within 5min walking. Same is true for little supermarket, bakery and fruit market (all open on Sundays as well).
We've been there with 2 adults and 2 kids, which maybe was a bit tight with the space, but still well partitioned.