Nice and modern interior. We were there with a 10 month old baby and it was great. The location is literally as good as it gets - we walked with the stroller wherever in central Madrid we wanted to go. The apartment also has plenty of storage which is really useful when traveling with an infant. The nearby pub generates quite a lot of noise at night so if you’re a light sleeper, consider bringing ear plugs, but if it didn’t disturb our daughter’s sleep, most people should be fine.