I totally recommend Katherine Torres from Vapues Tours if you are planning to visit Nicaragua.
She put together a month long itinerary for me, then redesigned it down to three weeks. We skyped to make sure she had all of my changes, all the time being patient and professional.
My itinerary included everything I wanted; I had a personal guide and the trip was filled with eco lodging and activities.
In the end I decided not go to Nicaragua, but not for anything having to do with Katherine. I just chose Colombia instead.