Hi, I own in La Mirada, which is an apartment block overlooking El Rincon.
From Alicante airport:
Take N332 heading towards Cartegena
Within 10mins of leaving the airport, you should go under a tunnel, if you havn't, you have missed the N332 turn off. Continue on the N332, ignoring any "blue" signs for Cartegena/Torreveija as they will be motorway directions which you do not need!
Keep going for approx. 40-45 mins, you will arrive at Punta Prima which has a pedestrian bridge over the road and shops, bars, restaurants & supermarkets either side. At the next roundabout, just past Lidls, turn right. Carry on straight up this road and on your right El Rincon is under construction.
The local Commercial Centre, is called just that, I don't think it has a commercial name! But it does have a 24 hour shop which is handy for picking up some groceries.
I hope I have helped, we are very interested in this development as it is so near to us, good luck!