First things - Big ques will make it difficult to talk to anyone, or get through to buy tickets in person, so you'll probably need to buy tickets on line, in advance and that's a bit of a faff on a phone. You will enter in a big group at the pint of your time slot and will all naturally gravitate towards the first point of interest on the audio guide you will also have downloaded to your phone. 50 or so people all in one spot - not too good for Covid prevention. You'll learn about the book's construction and ignificance, all of which are interesting and then you'll get a chance to see the book itself, which is again an experience, but you certainly won't be alone, because the display case only allows 10 or so people to view at the same time. The page is turned every 8 weeks or so, which means that if you are in luck, you'll see one of the highly illustrated pages, but if you're not, you'll see something much more 'plain'. Why don't they just leave it open on the most impressive page?!
Then you will nter the library, which is actually more dramatic - but again you will be in there with about 200 other people.
All in all, worth seeing, but not exactly cheap for something that at most lasts about an hour.