You can take bus E21 from the Airport (Ground Transportation Centre) and get off at Island Harbourview, then walk about several minutes to Li Tak Street, you will see the hotel.
The hotel is near to Tau Ma Tei Metro station, thus from the hotel to Disneyland, you can take mtr from Yau Ma Tei to Lai King, transfer to tung chung line to sunny bay, then take disneyland resort to get there.
From the hotel to Ocean Park, you can take MTR from Yau MaTei to Central and then take bus 6A to the Ocean Park. It is the same way when back to the hotel.
From the hotel to the peak, you can take MTR to Central, and then take bus 1 to get to the peak.