In all honesty, this tour is too expensive for what you actually get. The best part of the tour was the temple in Asakusa but that's something that is free anyway. The stop at the Imperial Palace was worthless - you can't even see the palace or the gardens. You see the moat and part of the old watchtower. The cruise down the Sumida River is really just a means to get you back towards Tokyo Station, not really very worthy of sightseeing.
Good tour but it is a long day. If you're going to do this tour, do it by bus and eliminate the train. It will cut an hour or two out of your commute. I would have liked to have had more than 30 minutes in Galway (and we only had a 10 minute stop to see Galway Bay). But if you're tight on time, this is a good overview. The Cliffs oh Moher are pretty but The Burren is the real gem.