i've been to PDR for the last 4years.
I love Dolce Vita, its past the Casino on the left-they do Pizza,Pasta and salads-their garlic bread is the best-its good value for money.
I have only been to the Titanic once, and believe me i wont be going back, after a mediocre meal we paid and left only to have the waiter come running after us that we had not paid the bill in full-this was in front of everybody in the restaurent. It might be a good idea if he could have counted and after he realised his mistake he left and the manger said nothing.
The Atlantis is their sister restaurent i would recommend you come here, the menu is more or less the same,the servings are bigger here and funnily enough its cheaper then the Titanic.
Hope this is of some help.