On our "must-see" list during our visit to Dublin last August, my wife and I found ourselves in a lengthy line for entry to see the Book of Kells and the Trinity College Library. We were relieved that the line moved quickly, and that there was so much to see in the way of related artifacts and background information before actually viewing the book. This preparatory display was excellent, but while the Book is fascinating to view, the experience of the viewing was less than satisfactory, given that it is on display under glass on a table with no control of the viewers at all. When we arrived in the viewing room, there were enough people clustered around the table that there was no chance to see the book; people were bent over the Book for a good, long view, and it took several minutes and some strategic moving to get close enough for our own look. A slidewalk or a controlled path around the table would have simplified the experience.
The Library was impressive, with the added bonus of seeing the ("mistakenly attributed to") Brian Boru harp. The hanging informational boards and the ropes restricting our movement to the area between the entrance and the stairs down to the store diminished the experience only slightly; the array of volumes, the spiral staircases and the other displayed material down the centre of the main isle made for a memorable experience.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.