My husband and I just spent 8 nights at B&B Bij Jeanne in Delft and I can't stop myself from reporting on how amazing this place was.
I found it on a lark by poking around Google Maps when I could find no affordable (for our budget) lodging in Delft. It looks far from the town center (the Markt) and the train station, but it ended up being far easier to walk to and quicker to do our exploring than I expected.
The B&B itself is very clean and the host (Josè) lives on site with her husband. You have access to the breakfast room where you can store items in the fridge and use the microwave for heating up nibbles. The breakfast itself...holy moly. We ended up never really eating out in Delft (besides a small sandwich or snack items) because we were that full from everything provided. And she even insists you take whatever you don't (can't) eat at breakfast to have for a snack later!
The room was the perfect size for two people, the bed was super comfy, and had enough space and storage to unpack our bags and settle in. The bathroom (private in each room), was surprisingly spacious. As I said, we were there 8 nights and it never felt too confined or cramped or like we were having to climb over one another to move about.
There are two rooms: one looks out over a very quiet street and the other looks out over Jose's gorgeous garden (this was the one we had). The conversion/remodeling (done by her husband) is solid, so we never heard our neighbors except for their door being shut and water running. The only "noise" we noticed were the church bells ringing.
But above all is Jose herself. She did everything she could to make us comfortable and happy. We showed up very early (about 11:30am) and she was more than happy to welcome us in, offer us a warm beverage (we were soaked from a very rainy walk from the train station), and then showed us to our room. Obviously this isn't going to be the case if she's booked up solid, but it was a nice welcome.
She also offered other special touches such as advice on sights to see, providing laundry service (for a very reasonable fee), and even gave us a big sack of breakfast treats when we had to leave early for the airport. She even, knowing we were nervous about making our flight, roped her husband into driving us to the airport for about the same as the train would have cost us (he had to do some work in Amsterdam that day so the airport was on the way for him).
All in all, I can't recommend this place enough and it was the perfect spot for Delft and a few day trips.