I arrived early to the train station that is very close and left my bags with the receptionist who was very friendly and spoke English (I do not speak Dutch.) They were not locked, just behind another counter until check in which made me nervous, but I did not have any problems.
The apartment itself is beautiful, clean and has everything you could need including a kitchen with utensils etc. and a washer /dryer. There is a separate 24 hour accessible entrances and key drop and I used both. All email correspondence was answered promptly. The biggest disappointment was that I couldn't stay longer!
Thanks!