The guesthouse is basically working as accommodation for the Antelope diveshop's clients, and also for its employees.
We had a rough start with them, since they forgot to pick us up from the airport. Normally this wouldn't be much of a hassle, but at 4am there are no taxis at Koror airport. After things have been sorted out, they ended up by offering us the accomodation for the first night.
Rooms are basic, but clean. There are single and double rooms (club house), with shared bathrooms, and also deluxe rooms and the bamboo cottage, offering higher levels of comfort and privacy. We stayed 2 nights in a double room and 2 nights in the bamboo cottage. All was ok, except for the matresses, which require urgent replacement.
The breakfast was basic but good: there are several options (continental, Filipino, American, pancake, omelette, etc.) and one must book it the evening before. The continental option ($5) is cheaper then the others ($8).
The staff was friendly and courteous.
We also spent 1 day diving with them, which was easy because they are located on Malakal island, right on the water. We did 3 dives: Grass Land, Siaes Tunnel and Ulong Channel. They were all amazing. The dive guides/instructor, although not fluent in English, tried to brief us as they could and were really attentive to us during the dives.
We also did the Super Rock Islands tour with Antelope. They took us to: Milky Way, Jellyfish lake, Clam City, Long beach, Big Drop Off, Paradise and Natural Arch.
All in all, they really know what they are doing and are very friendly. We definitely recommend them. Nonetheless, if you don't speak Japanese, be prepared to deal with some communication hurdles.