Great location! The apartment is spacious, very clean, and has great amenities (after traveling for 2 weeks the washer was much appreciated!). It is conveniently located to Birgu centre for some coffee / drinks / local morning markets as well as a very short walk to the ferry taking you to Valletta for less money (and time) than the bus.
Mariella herself is very sweet and then entire booking through check-out process couldn't have been better. I recommend staying at Mariella's and hope I will get to return to this wonderful country some day soon!