Great location if you want to stay in the heart of Barcelona and is at arm's reach of transport, bars and restaurants. One downside is that the backstreets can be pretty stinky and dirty... no fault of the host of course.
As we only stayed 2 nights, we did not use any kitchen facilities to comment on them. However, I found the bed comfortable and the bedroom/sheets clean.
Something we'd suggest is double-checking the listing and guest reviews, as the bathroom is actually shared, which we did not expect. We saw that there are actually 2 rooms rented out, so may be useful to have this in the description before making a choice.