While you have already finished travels, I am sharing my experience.
I was there this summer and I was totally underwhelmed with this experience when we went in early August, and how rude and unhelpful the staff were. I bought tickets ahead online and purchased the digital immersive experience as an add-on. It was extremely crowded and hard to see the whole exhibit. We saw the Book and the old library, which is missing most of its books. And no sign or person ever directed us to the digital experience. Part of this may have been the massive crowd. Mind you, staff were directing us how to get to the pavilion (I thought that may be the digital experience, but was actually the gift shop). Just really poorly laid out. Just know that they send an email/text with map to try to help you understand where to go. I read that and it didn't touch on the digital experience. Part 2 of this is the unfriendly and rude staff. Mind you, I had to buy tickets online days in advance because it can be hard to get tickets at peak times. It turned out that a family ticket for the three of us (my daughter is a teen) was going to be slightly better price than buying individual tickets. With the digital experience, it cost over $75 for the three of us. Well, my husband came down sick with the virus-that- won't- be- named that is going around over there. He decided not to go with us, partly so that he wouldn't spread it to the mass crowds and staff of Trinity. I had emailed Trinity in advance to explain and ask if we could exchange the family ticket for two individual tickets. They didn't email back. When I went to the ticket desk before our time, after waiting in line, they directed me to the ticket collector, who said "no-sorry" in an unfriendly, dismissive way like she couldn't wait to get off her shift. Later, I received the email from Trinity that basically said "sorry, no refunds." NOT what I was requesting. Just a price adjustment which also would have allowed them to admit additional people that day. Unbelievable. Anyway- the bell tower, which is sort of the signature architectural building that Trinity is known for is covered on all sides by scaffolding, and there were lots of construction trucks all around. My daughter wished she hadn't wasted her time on Trinity, and I have to agree with her. It wasn't worth the price given the crowds, not getting what we paid for, and the attitude of Trinity's staff. A little helpfulness and understanding would have gone a long way. Also, this was my second time seeing Book of Kells, and I can now confirm without hesitation that it is totally OK to miss.