We are taking an Alaskan cruise next summer on a Norwegian ship. Did not conduct a great deal of research. Needed to cruise out of Seattle and wanted to go with a previously experienced cruise line. I did check out cruise critic and the family vacation websites. Princess and Holland receive great reviews but we have no prior experience with either line.

NCL doesn't go to Glacier Bay- imo, the single best thing about an Alaska cruise. Jim
We are going to Alaska next year on Norwegian from Seattle, WA. The Ports included are Juneau, Skagway, Glacier Bay National Park, Ketchikan, Victoria, BC, Canada. Norwegian is more laid back than some of the other cruise lines. There are no formal seatings for dinner, etc. Also, they are the only union run cruise line and you're eligible for a discount if you're a union member.