We are similarly renting from the owners in Britain. Penthouse apartment with roof terrace all to ourselves ! We have been to this area about 10 times now and the area is fantastic. Short drive up the motorway is Cartagena (sp) which will let the ladies shop till they drop. The two main restaurants in the nearby town are Rosalinds and in particular Patio Dos, where they do ox fillets on a griddle at your table, mmmmmmmmm.
Can't wait to get back !
Don't be tempted by the "Beach Club" PR nonsense ; it takes ages to get to there ( bus, boat,bus) and is...well...rubbish when you do.

We rented an apartment in block 65 of Roda Golf Resort in July, lovely resort with a great clubhouse, very good food, lovely staff. Booking process very easy, booked through Owners Direct (S10455). Ten minute drive from the airport
The apartment is lovely, spacious and very clean with a great terrace steps from the swimming pool, the local town of Los Alcazares is great, fantastic restaurants and beach. Terrific area for a beach holiday and Cartagena is a beautiful town to visit, if you're staying at Roda you will definately need a car to get around.
Would definately go back to tthis area, one of the best and cheapest Spanish beach holidays we've had.