A group of us stayed here in November.
Rooms were really clean and cleaned daily with fresh towels.
Staff were really nice and helpful.
Couldn't fault this hotel for anything apart from it didn't have a lift to get to the top floor with suitcases but oh well. we all have legs...
It was further out than I've stayed in Amsterdam before but there was a tram stop close by (number 2 tram) which takes you directly to all the main squares.. it took about 15 minutes from the Apple Inn to Leidseplein.