I will recommend this tour if you have not much idea about Cambridge and its history. I found the tour to be informative. Best way to use this tour will be to attend the tour which should give you good idea about town , different colleges etc. and then go in the area after tour where you want to explore more
Excellent value for money, lots and lots of information including how the Cambridge University system works, history of some of the colleges, mention of many graduates that have become well known, quirky facts and much, much more.
Need to be fit enough to walk/stand for 2 and half hours. It rained a bit but didn't dampen the fun.