The guides and porters were absolutely fantastic. The only thing that kept it from being a five star review was not their fault at all... it was mine for going during wet season. We had about two of the four days with rain, which can make things not as fun.
I would do this again and would definitely use Inca Trail Reservations again and I would highly recommend Edwin, Jimmy, and Rony. But I would only consider doing it during dry season. I did the 12 km one day hike in July of 2006 and the fact that there was no rain made the experience much better.