Forty to sixty minutes is the arrival window: what a therapist needs to reach any central Amsterdam address, one span for every district and every hour.
The arrival window is the time between a therapist setting out and her knock, and for anywhere in central Amsterdam it runs from forty to sixty minutes. One span covers the whole centre. The house publishes no quicker figure for one neighbourhood and no slower one for another, because what decides a late journey, a bridge lifted for a passing boat, a street closed for works, a last tram already gone, can happen anywhere in the city and at any hour.
Where half has been sent ahead, she leaves once it has cleared, and the window is counted from there. For the one booking settled wholly at the door, a known client's hour or two today, she leaves shortly after the office has confirmed in the thread.
For most massage the window is simply a wait. For nuru it is time that can be given to the room, and small care taken now repays itself for the rest of the evening. Raise the heating the moment the thread confirms, because hotel rooms warm more slowly than guests tend to expect; the entry on temperature explains why warmth matters more to gel than to oil. Open the hot tap briefly and note how long the heat takes to climb the pipes. Clear cushions and throws from the bed, and leave a clear path from bed to bathroom, free of bags and shoes. The guide to the nuru shower and sheet adds the remaining detail.
Schiphol and the hotels beside the airport keep a different clock. Visits there are timed by arrangement, agreed in the thread, and each carries a deposit. If you want her before the hour is out, the page on nuru tonight traces a late request from its first message to her knock.