We were 1st time cruisers so I can't make comparisons, but there's no need because we thought the Pacific Jewel was great. A few highlights:
Service - staff were ALWAYS polite, friendly and well-informed. Not once were we fobbed off or rushed when we had questions. Everyone we spoke to seemed to enjoy doing their job. Everything was micro-managed so that we never waited more than 1/2 an hour to disembark or return, even on tenders. Amazing organisation.
Being at sea - I loved being on the ocean, the roll of the ship and the fresh (sometimes very fresh - it was cold!) air
Entertainment - what a talented crew! I went to every show and enjoyed them all. Also went to dance lessons, trivia, bingo...something for everyone.
Food was very good at the Waterfront - service from our wine waiter Christian and waiter Roshan excellent. Food at the buffet was not quite the same standard but still good.
A few things we found underwhelming:
Cost of the Internet!
Prices at the spa were ridiculous.
There were a lot of sessions that were really sales pitches - for detox products and the like.
Behaviour of some other passengers - cutting in queues and taking food from the buffet with their fingers (yuck).
Only one laundrette for 1900 passengers!
It was so easy to meet people.
Walking the length of the ship several times a day going here and there - great exercise.
Changing for dinner - I expected this to be a chore as we're pretty casual, but we found it made a nice contrast to everyday life.
Overall: I'd always wanted to try a cruise and enjoyed it very much. However we did find 13 nights a bit long. For a first-time cruiser I'd recommend a shorter cruise.