Sometimes it's worth to stay in Bed & Breakfast such as the Alexander instead of usual hotels because then you can have the unique opportunity to share your experience together with local people that are always ready to help you organizing your visits as well as ready to chat friendly with you.
This B&B has been the best choice,in a typical building, it´s just next to the museum district and you can reach the city center with a nice walk... the room are very clean, big, with wifi connection and with extreme attention to the details (our "red" room was so romantic). Janneke (the owner) has been the kindest person ever, we found a small bottle of wine in our room as welcome drink.
Janneke has been so kind even when we did the big mistake ever forgetting to give the keys back at the check out and sending them later by mail.
If you are visiting Amsterdam, avoid expensive hotels with bad ratings, this B&B is the right choice!