There are different ways to get to the apartment: renting a car at the airport is quite cheap, it is my recommendation, there is also a good taxi service, and Transfers available on the internet. There is also a good bus service, the bus company is called Global, In its web page you can see itineraries and routes the bus lines from the airport to the apartment are lines 66 and 90 with stop at Yumbo Shopping Center and then walk 5 minutes.