Apartment is exactly as described and is clean and very comfortable. Central location in the heart of Bilbao's Casco Viejo accessible by airport bus and tram (a short walk) with lots of bars and restaurants nearby. Xabi provided some bar/restaurant recommendations. Well-equipped kitchen (including dishwasher and washing machine) even if we didn't cook. Nespresso capsules and milk provided - thank you :-)
Other reviews mention noise and while earplugs were provided by Xabi, we didn't need to use them. On one night, I did hear conversation from the apartment above in the early hours of the morning but it didn't prevent me from sleeping.
After check-out, Xabi provided storage for my luggage as I was taking an evening flight - very much appreciated!