Spent 5 days at Lux Mar, early June. Nice studio with kitchenette and bath tub, luckily had a great sea view. Also very enjoyable to be able to cook and have drinks on the balcony.
Overall pretty quiet (probably because season just starting), 2 clean swimming-pools (one small and one big), nice and helpful staff as well, bought boat and club tix at the reception and the girl called a taxi for us, that took just 3 minutes to arrive.
Ok wifi in the lobby, 2 minimarkets 100m away, lots of restaurants boarding the sea near Figueretes beach. Friendly people, the food at Diva restaurant is spectacular and the service very impressive, with very decent prices.
Only downsides: kitchenette not so equipped (no oven/microwave/kettle/bowls/sponge), no free wifi in the rooms, beach quite dirty.
Don't miss Formentera, the southerly island protected by UNESCO - boats departing every 1/2 hour from the port, a few leave from Figueretes beach. Ibiza Town is very pretty too, loved the tapas and sangria.
Conclusion: excellent value for money, I would definitely go back to the same hotel.