Marylene's apartment is the perfect location for a quieter, local-feel with extremely close access to the water. We loved our stay there, and Marylene was a wonderful host!
The only word of caution is: if you want to be able to get up and go out for a good coffee & breakfast, you won't find it in the near vicinity. You can either walk across to the other side of Sliema for a sit down breakfast (15 minutes), or grab a donut and mediocre coffee down the street. If you're willing to buy and make yourself breakfast, there is a grocery story and produce truck on the corner!