I had a wonderful experience with Inca Trail Reservations / Salkantay.org. I did a lot of research before choosing a company to go with and Salkantay.org had great reviews and I had a friend used the company a year ago and enjoyed her experience as well.
I thought that the service, food and equipment was all very good. I liked that the guide (Americo) taught us things along the way and that he gave us some space while hiking also instead of making everyone hike together all the time. We really enjoyed everyone we trekked with also.
I would definitely recommend this company to friends and family ! Oh, and my boyfriend proposed to me at the top of Huayna Picchu so it was definitely the best trip of my life !