As with most guided tours, timing is everything. We took this tour on a Sunday and Winsor Castle was extremely crowded. We really had to hurry through. Both Stonehenge and Bath were busy but not near and crowded as Winsor. We had time to look around and enjoy both. The tour guide was knowledgeable and quite humorous. He called our attention to many things along the way while traveling between sites. For a day trip from London I recommend taking a tour like this.