This Hotel is away from the airport however it does have some views of the airport.
This is a modern 4 star hotel with 13 floors (12/13are executive rooms), its not a cheap hotel so will not apeal to all, there is a Restaurant and bar on site. its a 5 min walk to the bus/train to airport centre and the viewing deck or 10 mins walk to supermarkets/shops for supplies. Car parking in connected car park to a cost of upto EUR20 per night. The hotel is bookable on All Accor/Booking.com/Trivago etc
I am on 10th floor at the end 1032 and as such has 2 windows front/side which means pictures can be taken (400mm) of aircraft departing runway 24. Floor 8-10 I would think is what is required and you need even number rooms. Excellent views of Schiphol if a little distance, Other than Polderbaan. all the runways can be seen and as long as you are ok with electronic means spotting not an issue
All aircraft landing on Polderbaan taxy past as per picture 1
Aircraft arriving onto 27 or departing off 18L can be seen as per Picture 2
Departures off 24 or cargo can be seen picture 3
biz jets can be seen arriving/departing at distance in similar area to picture 2
https://maps.app.goo.gl/81xU5ryZWJuxjWmZ9
credit Phil Globe.