We have stayed in Carl's villa a number of times, with friends and with family. S'algar is quiet, perfect for a family holiday and has enough shops and restaurants to mean you don't have to travel far if you don't want to. That means to you can relax around the villa, sit on the roof terrace, play games on the patio, or enjoy the fantastic pool - which is big enough to swim, play or just cool down in. There are 'proper' supermarkets a short drive or bus-ride away, if you want to stock up the fridge and cupboards.
The villa has its own off-road parking, which is great (especially for unloading cases or shopping) if you have a hire car, and travel around the island is quite straightforward. Roads aren't too busy and well signposted. Buses to Mahon and beyond leave the village centre every hour and S'algar is on the island's Cami de Cavalls coastal pathway, if you fancy a day's walking or cycling - find some secluded beaches and old lookout towers.
We have been to Menorca 4 times now and still find plenty to do. Recommend snorkelling in the bay, the village bakery for coffee and pastries, the pizza restaurant is good, kids loved the go-karting in San Luis, drive to the top of Monte Toro and see the whole island and take a boat trip out of Mahon.
We hope to come back again soon.