This tour was amazing!
It was excellent but too much walking, probably approximately 5kms from train station to the university and back. We expected to be bused into the university for the walking tour to commence. Wish we had been informed earlier.
It was a really good small group trip. The only thing I would have wanted is more time to walk around the beautiful cambridge.
We wandered the station looking for 9 3/4 platform. No one could give us directions. We asked information, security staff, etc. Even the stores at 9 3/4 Harry Potter said they didn't know anything about it. Time was up, so we bought our own tickets to Cambridge, paid for a Hop-on-Hop Off with Punting and had a great time without the Evan Evans tour.
This tour should be half day. I and the other 4 fellows had way too much idle time with nothing to do. You can also do it yourself to save time and money because the tour does not add any value.