Great experience!. We had five wonderful days at the Salkantay trek. We started very early with a pick up from Cusco and four hours and a delicious breakfast later we started our hike.
The group size of 8 people with different nationalities was a good mixture. Our guide made us feel very comfortable from the beginning. He also set the pace depending on the different group members and her physical education.
The lunch on the first day was amazing. But not even on this day, every breakfast, lunch or dinner we had was fantastic and very varied. Be aware of the height. The trek is, especially the first two days very exhausting. But there is the "horse option" and actually you can set your own pace. So it's worth to go for it. When would you ever climb to 4600m in the Andes again?.
I would really recommend to do this amazing experience !!.