I stayed at Constance's for 2 nights and was very happy with my stay! She and her husband are very welcoming, although I didn't see them very much as I was visiting the town and they were working. The accommodations are clean and comfortable. You just have to know that you will be sharing a small bathroom with the other guests.
Overall, it was a great experience, in a perfect location in the center of Barcelona and close to the ramblas.
Thank you again Constance and Gonzalo for being so understanding and for the overall good experience :)