We spent 4 great nights in Barcelona and enjoyed the city and Roberto's apt. The flat is small and quirky but the longer we stayed the more we enjoyed it. Roberto is a great communicator, always prompt in reply, and check in was smooth and easy.
For travellers arriving by train it doesn't get much easier than this, literally a five minute walk with one turn from Barcelona Sants station.
The apt is small but fits in two bedrooms one in a loft and the other in a sort of basement. The heating unit is in the bedroom so it takes forever for the heat to get into the living area. Once it warms up though it is cozy. There is a fully equipped nice size kitchen.
Many reviews comment on the size of the bathroom. I am 5'9" 170lbs I could manage fine even though it was small a 6 footer or a 200lb wide body may find it too much of a challenge. The hot water in the two sinks seems to have a mind of its own, but we could live with that as there was lots of very hot water in the shower which was a decent size even though the bathroom was small.
All in all we had a good time and grew to enjoy the apt the longer we stayed we slept in both beds upstairs and downstairs and the were both really comfortable. All in all a pretty good experience.