I stay in Delft 4 nights a week and the Emauspoort is a brilliant place to stay! It's right in the middle of town close to some fantastic bars and restaurants. The owners and staff a really welcoming and friendly. A nice touch are the fully equipped Gypsy caravans which you can book in the courtyard.
I would recommend the Emauspoort to anyone looking for comfort, a wam welcome and a real old world charm at a very good price!