We stayed at the modern recently And found it to be clean, fresh and "nice". It is not as fancy as the local resorts we saw, having a small pool only. The adults only pool is an ankle deep pool. Service was good. This hotel does not have an activities desk with pamphlets as other hotels, and bus pickups are at the hotels on either side which do have activity desks. It is a good 15 minute walk to Waikkiki but only 2 blocks away from ala moana shopping centre. We experienced loud protests twice in 1 week by disgruntled Modern workers, which was a little unsettling.
The addiction nightclub was the place to be for dancing. Free water and free wifi are a plus. And it doesn't have the busy feel of the other hotels.