If you like to sleep well and long this apartment is not for you. Around 5h30 the garbage collection is your first alarm, after a 30 minute snooze there's the noisy church bells ringing (every hour until 10 or so), underlaid and continued by dog barking and honking cars.
If you get up early anyways: Interior is top-notch though and the location is good to start exploring Valletta. Bring your own oil/salt/pepper/dishwasher tabs, if you want to cook.