First I was a little bit concerned about the trip and yes the trail is really hard. If you are not in a good (normal) condition think twice about it.
However the invesment in the Inkatrail paid off 100%. It's a long journey where you get prepared to see one of the most amazing places ever and the moment you pass the sungate is priceless. The tour was well organized and our guides, Victor, Marco and Sergio did everything to keep it like this.
Sure it is an expenisve experience but with all the porters, the delicious meals we got, the guided tours and the places we have visited it was worth it !!.
It is a life time experience - if you do it, do it right !!.