I second that. We were unfortunately lured by cheap prices and a rather fancy website http://www.clubraro.co.ck/ to stay there for a week last year and it was pretty much a dump.
If you're into
1. roosters/chickens coming into your room & generally making a ruckus all the time & everywhere
2. unfunctioning toilets
3. pushy staff trying to sell their dinner buffet
4. papaya
you'll love it though

The tropical breakfast included in the price includes lots of fresh papaya which was exotic the first morning but after a week, you get pretty sick of it.

Otherwise we loved Rarotonga and I can also recommend the Aitutaki trip, it's glorious there.

We had many enjoyable meals on Raro, although the Spaghetti House by one of the big resorts was pretty bad.

For exercise, hire a bicycle, it's very flat if you circle around the island and tehre's a multitude of very beautiful deserted places.
We were there in June and the weather was very pleasant and the water is just divine for snorkelling.
Enjoy your trip there!