Immersive 4K video. This is a great Alaskan Cruise - Northbound on the Celebrity Summit. This is an older and smaller ship but that is what makes it better! Celebrity takes good care of their ships - no big crowds, excellent food. Take this one instead of a mega ship out of Seattle. Small hassle getting to Vancouver but worth it! Alaska Railroad train is incredible but the bus is great too. Stay the night in Anchorage and avoid sleeping on the plane. :-)