Spent 3 days with London Tailored Tours during early March and our family had a great time. We had 3 different tour guides. All them were extremely knowledgeable and able to talk to both our daughter, 10, and us, so everyone was engaged. If you are a Harry Potter fan, I highly recommend taking the tour with Linus, as he points out so many details that most people would never know or see. One detail which we found unique (we have done other private tours elsewhere), was they made reservations for lunch at restaurants near the tours, which was extremely helpful.