I highly recommend doing this trek with Inca Trail Reservations , I got a reference from a friend & this is my reference :)
Really great guide, really great hard working porters, great information along the way. It was a really great experience and I'm really glad I did it, just don't do it with a stomach bug like me. Otherwise no dad feedback, each day was full of great sites with lots of information, great information on plants, animals, mountains & the local people. Not just the Inca sites so I was very pleased.
The whole experience was well worth it. So get off your ass & see these beautiful mountains & learn some fantastic history.