Did this cruise last year on RCI's Jewel of the Seas. It is a great cruise and a great ship. Everything was very good. Itinerary was a good one. Regardless of what cruise line you take, you will really enjoy this particular itinerary.
I'll be sailing the British Isles in July 06 for 14 days on the Sea Princess(1st two weeks of July). Its a good Iten and the ship is just the right size. Not too big..just right at 77,000 tons.
While the Jewel is a newer ship, it does have a higher density of passengers and Princess food(in my opinion) is better.