Visited the Nikko/PRR 7 nights in June, 2009. The hotel is gated with nicely maintained landscaping and modern, open public areas. The lobby is open-air though well covered for the frequent rains and is bordered by a stocked ponds with small sitting areas therein; the hallways are likewise open. The pool has a zero-depth entry though is meant only for wading. There is a man-made lagoon (open to the waterway behind the hotel) with a small artificial sand beach with loungers and umbrellas. I did see a couple of rats scurrying around. I'd hoped to be able to walk to nearby businesses but I misjudged the distance and needed a taxi to leave the hotel (I'd not recommend walking or bicycling on the main road after dark due to traffic and poor lighting). There is a spa but the prices seemed outrageous, even for a hotel that aspires to be a resort.
I had a king bedroom. It was nicely furnished with marble floors and modern if slightly worn furniture. There was a small desk and comfortable sitting chair with a flat-screen TV (mostly Japanese channels though there was BBC, CNN and a couple of other English-language channels). The porch, accessable via a sliding-glass door, was somewhat narrow but had two small chairs and a table. The bathroom was large, with marble vanity and recessed lighting and a tub with hand-held shower nozzle. There was a seperate toilet room. The bed was comfortable, if a bit firm, with individual adjustable reading lamps on either side.
The air-conditioning was controllable via a seperate thermostat and was able to keep the room at about 23 deg-C; a ceiling fan helped.
The restaurant overlooks the "beach" and public areas and is nicely furnished with a modern, simple look. The food was uniformly asian (breakfast, lunch and dinner) as were most of the other elements of the hotel. I was the only Western guest as far as I could tell the length of the 7 days I was there. The prices in the restaurant seemed excessive to me for the value - even with the cost of a taxi into Koror it was cheaper to go to an outside restaurant (and the food better and of a wider variety as well). It was by no means a gourmet restaurant - pretty basic Japanese food (it's good if you like fish-constantly). .
The staff seemed unusually attentive with doors consistently being opened and virtually every staff member greeting me by name. Everyone seemed eager to please though I had consistent comminication challenges with the Filipino/Japanese waitstaff, bellman, front-desk personnel, etc.
My biggest issue with the property was that the water from the faucets was not drinkable - you have to buy bottled water from the gift shop or drink the water in the restaurant (which is apparently filtered); there are notes asking that you not bring in food or drinks from outside the hotel.
In summary, the Nikko clearly caters to Japanese tourists with food, signage and other elements though I felt very welcome. I think the price of the room is a bit high for the quality and amenities and the prices of food, water, etc., is also high. The location is fairly central to Koror though you really need a taxi to go anywhere negating this as a benefit.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC