We stay at the Costa Inn every year in January and sometimes in May on our way in and out of the country to our sailboat.
They offer a free shuttle from the airport (generally a $25-30 taxi ride) and he return has a nominal fee. The rooms are simple, but clean. The hotel has a 24 hour restaurant for those late night arrivals and offers a free breakfast.
It's a wonderful bargain for a quick stay.
The location is not as convenient for walking, shops and restaurants as some of the other districts.