I've stayed at this hotel on numerous occasions as I work with a company located across the road in the business park, so the location is excellent for my needs.
I've always found the hotel to be reliably good. Clean rooms, good service, good facilities. The gym is pretty well equipped as well. There is a good shuttle service between the hotel and Schiphol airport, from where you can get the train to Amsterdam city centre.
All-in-all this is a good standard business hotel, slightly out of the way if you are a tourist looking for the sights of Amsterdam city centre.
The last time I stayed, I was upgraded into one of the newly refurbished rooms - really nice.