I booked a trek with nepal alternative treks (NAT) with a custom itinerary. Mr. Tej was very helpful from day one and he could accommodate all my requests. He was also very helpful in arranging flights, ensuring the updated times were passed back to me and my guide.
My guide for the trek was Krishna, is a fantastic fellow. Sincere in his approach and very helpful through out the trek from taking care of me when I was ill to guiding me through some rough patches.
I enjoyed my trek overall and would highly recommend them.