It was perfect for what I needed it for; an overnight stay after a long flight from the UK arriving at 11:30pm.
I got a taxi from Haneda airport which took about 15mins and cost me 2000 Yen. There are trains which stop nearby but I had missed the last train leaving the airport by the time I got through customs.
The staff on the reception was lovely and smiley, had very good English and was extremely helpful.
When I got to my room after buying some water from the reception vending machines and getting the WiFi password I was so happy to relax in the comfy bed.
It's not swanky regarding the facilities but it is a lovely simple hotel; who wants to stay in the hotel on holiday anyway? I would definitely go back.
I stayed only for one night in the hotel waiting for my flight back home to USA. From Nagoya International Airport, I have to fly back to USA via Haneda International Airport and this hotel is reasonably close to the airport. The hotel is very clean. The staff when I checked in was very helpful even helped me with my luggage. The room was very clean though a bit smaller. Overall my experience with the hotel was very good.
It was hard for me to find. Make sure to use Google Maps to navigate your way. I walked from Kamata Train Station. After a frustrating navigation trial and error, I found a wifi hotspot and used Google Maps to navigate my way closer to Grand Park Hotel. Once at the nearest crossroads, I asked a nice Japanese man at a nearby cafe where it was. Once there, I was very pleased with the Japanese hospitality of the staff, cleanliness of the hotel, etc. They even offered me a cart to carry my cumbersome luggage :). The room was a bit small, but that's the norm in Japan. Amenities were great - Ironing Board and Iron, Refrigerator, HDTV, Burner Plate to heat tea, radio, hot water, A/C, and modern Japanese toilet. Bottom-line, it was clean, modern, and worth the money I paid. You will enjoy it too - just make sure to recon your route beforehand.