We stayed at Aquarius in the dorm rooms for a week.
Because Rarotonga is small no matter where you stay you can still easily get anywhere you want to go.
We walked into "town" multiple times from Aquarius.
It is basic accommodation. But it is clean and tidy and the staff are friendly.
The resturant has well priced meals and can get Rarotonga busy due to being close to the airport.
The out door area is simple with a pool, a few hamocks and tables. The beach to overlooks is just rocks so don't expect the swim here.
Out bunk room was airconditioned which was a must and there were plenty of bathrooms for everyone staying.
I wouldn't want to spend all my time there but it was a good place to return to every night where the staff knew who you were.More