We (myself, my wife, our 2 children, and my wife's parents) decided to "do" Europe. We flew to London and made our way to Rome by way of Paris and Venice. Our ages ranged from 8 to 72. We've all sailed many times in the Caribbean, but never Europe.
Embarkation at the pier was so easy. There was a line, but it moved quickly. We only had carry-on bags, so that helped. Disembarkation, usually a cluster, was also easy.
We were a bit hesitant about the Jade -- she's a little older, she's not a megaship. I can tell you now, the Jade is amazing. Beautiful inside and out, clean, welcoming. The cabins are a very good size. We had an obstructed OV on Deck 8 and my in-laws had an interior across the hall. Both were the same size and we had plenty of room. The bathrooms are larger than on most ships we have sailed, and ours even had a separate WC.