It is the best option to feel a city and get a good overview along with tidbits of information. Better than tube as a mode of transport and less tiring than walking. I was looking to sign up for big bus tour in Paris as well, until I read on Rick Steves' guidebook that L'Open is better in Paris.
Now, the "not-so-good".... We re-joined the bus at stop 22 intending to continue the journey but hopped on 13 instead. I guessed the signs were not as clear plus it was drizzling that day. We ended up re-touring stops 13-21...at 6pm rush hour which made my dad and I all weary that day.
On the overall, I think Big Bus tour is a fantastic idea of getting a good feel of a city. I have already recommended it to friends.
To reply as a company, please log in to your business account.