We booked the 20 euro 1 hour tour and would thoroughly recommend it. Some of our party were a bit unsure about going on the segwaya but they were very patient and ensures we were all feeling confident before we set off. Our guide (sorry I forget the name) was great and we had such a fantastic time. One of the best things we did whilst we were in Madrid. Lots of photos were taken by the guide which she said she would email so looking forward to seeing them.