Hey ! I went to Machu Picchu via the Inca Trail for four days in the end of September and I have to say that I was surprised how cool it had been ! We were walking in a very nice group of people of every age from many different countries.
First day was quite easy to walk, and I really loved the amazing landscapes. But for the second day you really need a bit of good condition because it was a lot of hiking, but it was really worth because at the third day, you walk through the jungle and three Inca tunnels !
On fourth day we arrived Machu Picchu, the weather was not perfect but in total it was a just awesome trip with nice people, very funny guides and unbelievable fast porters. I can recommend the trip and the agency ! Thanks for this nice adventure ;-)