This was the first segment of our Back to Back cruise, ending with the Trans-Atlantic to Fort Lauderdale. We arrived in Barcelona several days early to give us a chance to sightsee and get used to the time zone. The flight from Orlando-Frankfurt was an incredible nonstop. We booked through Choice Air, getting a Lufthansa Premium Economy for a third of what Lufthansa had on their website. Premium Economy is my definition of first class: wide seats, huge legroom, eye masks, blankets, extra checked bags, seating two-across, menu selection for dinner and breakfast, unlimited wine (which we didn't drink). Be aware that Frankfurt airport involves a lot of walking to get to the domestic side. We must have slept on the plane because we had no jet lag issues.
This was our second/third X cruise.
Ship: Everyone on staff seemed genuinely happy we were there. They always had a "Good Morning" and a big smile. Folks were always cleaning, wiping things down, picking up litter. The ship is quite smooth especially when docking and leaving. Very little vibration or noise.
We didn't really use the veranda, mostly to check the temperature outside. The cabin was very quiet, midway between the two elevator areas. We had the adjoining configuration and the hallway doors were open. The cabin had many closets and cubbies we didn't even use. Our suitcases fit under the bed (A CC suggestion.) We brought our magnets and they came in quite handy to keep our paperwork in control and clipped to the wall instead of getting lost on the desk (Another CC suggestion.) The cabin steward and assistant were super. They were always busy and raced to open our door before we could get to it. We heard a rumor that X was changing the cabin staff to just one Attendant per cabin. Hopefully, they will also lower the number of cabins each attendant needs to clean. Will that change the gratuities we pay or they receive? Himmm. The Internet speed improved when I moved my Kindle to a few inches from the cabin door despite there being a Cisco wireless unit a few doors away. The solid shower doors made the shower compartment spacious. We had more clothes hangars than we could use. The provided pillows were quite flat so we asked for contour pillows, which were much better.
Make sure you'll have good weather.