Just to add to my previous comment.
For a first time cruiser, this is a good introduction.
The itinerary is interesting, the ship has a good selection of bars and restaurants, and there are good flight connections from the UK.
I would be tempted myself, if I didn't have another holiday booked in November.
The only possible downside is that the Med weather in November can be a bit iffy, but that would apply regardless of the cruise line.
Hopefully the OP will let us know his thoughts.