I had a great time walking the Salkantay trek. Loved all days. Food was wonderful, always enough. We were very lucky with the weather. First day it was hot and the mosquitoes already attacked. Make sure to pack enough sunblock and insect repellent.
Second day was though, had a lot of problems with the altitude despite spending three days in Cusco before the trek. On the third day we went to the hot springs which was really nice for the muscles.
Our guide was funny, nice, spoke good English and had a lot of knowledge about the surroundings, plants etc. It was a perfect trip.