You will be charged (I think) 72 euro each on your credit card for tips. No other tipping is necessary and I didn't see anyone tip any extra in the bars or restaurants.
As I mentioned in the previous post, everything is included but you can pay an extra 70 euro each for the week to take the upgrade drinks package. That way you get better quality wines (the table wines weren't very good, to be honest but the cava and sangria were fine), premium brand spirits, cans of soft drinks instead of the mixer or out of a big bottle one and a bigger selection of beers instead of just Mahou draft. If you don't take the ugrade, you can pay a little extra for each drink such as Dos Equis, Corona beer, Warsteiner and Heineken for 2 euro.
This link will show you what brands are included and what you pay extra for:
You don't pay those extras if you have purchased the upgrade drink package for 10 euro a day.
However, bottled water is not included in the upgrade package.
This is not a 5 star cruise ship with big show entertainment, rock climbing walls or golf. I would put it on a par with a Thomson ship but treat it like a bus that takes you to nice places and gives you food and drink and you'll be fine. It was better than we expected and, although old, was very clean and spacious.
Just remember, it's mainly Spanish and they are the noisiest and most talkative people on the planet. They travel in large groups and all talk, loudly, at the same time.