The Smartments near Berlin are really lovely, modern, light and clean. They are great at communicating with you before you arrive and send you detailed check-in instructions for if you arrive after 5pm. We had no problem with the key or getting into our room. It is literally 15 seconds walk to the station which is ideal for getting into Berlin, where the train takes about 15 mins. Once you buy a ticket, REMEMBER TO VALIDATE IT IN THE LITTLE MACHINE!!! Otherwise they will try to fine you €60. (It’s a ridiculous system for those used to UK travel.) The apartment had a coffee machine (but no milk) and all the kitchen amenities you could need if you did choose to cook. We felt safe and secure and the building itself was deadly quiet. We barely saw anyone! However, there was an air vent in the room which made a constant loud humming noise, even overnight, and a strong blue light above the kitchen sink, both of which, if you’re a light sleeper like me, means you will struggle to sleep. Those were the only real negatives to be honest. For a cheap, safe and clean place to stay with easy access to Berlin, I would highly recommend.