Monse's apartment is in a phenomenal location in old town. The unit itself was wonderful: clean, well-stocked with everything you could need and comfortable for our family of four. Yes, it is extremely loud at night as it's right above a fun, crowded and noisy street...so if you are looking for quiet, this isn't your place, but if you can handle the noise, the location might be worth it. Monse herself didn't check us in, but her sister did and she was extraordinary gracious, thoughtful and warm.
Finally, I need to mention one incident that happened. There was a strange, unidentified man that entered the apartment at 6:30 am one morning while we were sleeping. This was very scary and unsettling as you can imagine, especially for my children. We do not know who he was or what he was doing there, and the host didn't mention anything about other people entering our apartment. He didn't harm us or steal any of our things, but there shouldn't be people entering the unit without our express consent. For this reason alone, we can't fully recommend this place....but San Sebastian itself was awesome!