I had a great trek and it was well prepared by ACE. i will caution trekkers however that i did suffer from altitude sickness and you should be aware of that before your trip. i got so sick i had to be air lifted out, and ended up buying the wrong insurance beforehand. do NOT use global rescue, use another outfit that ACE will recommend. Again, ACE as an organization was great and professional with great guides and Prem runs a wonderful legitimate business. Guesthouse stays are rough on the mountain (as to be expected) but the International Guest House in KTM was fantastic so ask for that!