This is an amazing apartment with a very good location in Madrid. The apartment is very cozy, new renovated and just in general super nice. Sebastien is very easy to communicate with and very friendly. Also the smart lock system is very easy, you can just download an app an unlock the door with the app. I have nothing bad to say about this apartment or Sebastien. I would like an apartment like this myself, and would for sure come back if I ever visit Madrid again.