Good generally - depends on tour guide though
Review by confirmed purchaser
The option to hop on & off the tour & switch to the boat if you choose to is excellent. The first bus that we got on had an excellent, funny guide who interacted well with the customers. We then got on a boat at Westminster Bridge - it would be good to have an official tour guide for this although the staff member from the boat did an excellent job. We then got on another bus at the Tower of London, having exited the boat there. This tour guide was knowledgable but there was no real spark or extra interest given in her delivery. If at all possible it may be beneficial to pause the bus at key sites although I understand this may not be viable. All in all a great tour though, and having thought about it good value for money!