I had a lovely stay at the Queen Suite. It's a nice little appartment with bedroom (slept very well), bathroom and living room with a kind of kitchen area (to cook some simple meals), there was everything I needed.
I appreciated the pool and whirlpool area which is about 10 minutes by foot.
If you want to have a relaxed and quiet stay in Poipu and don't want to pay for hotels I can recommend this accomodation.