We did the tour a couple of weeks ago. We enjoyed it but what really made a difference was interacting with the guides in each location. Felt like they all had a story or two to tell, and they were entertaining as they'd probably told the same story a million times.
We were lucky I think that we weren't in a particularly "chatty" group so we didn't have to wait long for an opportunity to chat to each guide.
So for anyone thinking of doing it, I'd advise forgetting about the iPad thingy and just making a beeline for each of the guides.