My mother and I traveled on Costa Luminosa from Venice to Greek Islands ( August 24 - September 1). This was our first cruise so we went with an open mind and not really knowing what to expect. We had a balcony room thank goodness I can't imagine a room without a balcony - so that was a positive. Waking up and having a coffee on the balcony was really nice.
We are Canadian - English speaking and found language to be a barrier most of the time. Some cruise employees knew English but far and few between and when we needed assistance the limited English on board became an issue. Be prepared to hear a lot of Italian by fellow cruisers and employees - They do announce things in English but it is not very clear and can be easily missed.
Overall, I found the Italians to be rude on board - pushy and always butting in line and smoking in your face.
Cabin had enough room for two people and we really enjoyed the balcony - bathroom was spacious.