We had a very nice time at Cj's place in Rotterdam. The studio is spacious and very clean. It has everything you need and even more. It is not exactly in the center, but the walk there is quite pleasant. We also liked the fact that it is right under the roof.
We arrived a bit later than was expected, but Cj was very kind to meet us and explain all the details.
Just be warned that the studio is on the fourth floor and you have to climb a very steep and narrow stairs there. Also no safe place to park bikes (if you arrive by bike), we had to park them at the train station.
You will have a private bathroom, but the toilet is shared with another studio. For us it was not a problem, we have not seen our neighbors once.