I would warmly advise you to book with Hillstrek if you are visiting Nepal! I booked a Mardi Himal trek with them and a one-day guided tour in Kathmandu and they were both amazing and perfectly planned. Trekking was absolutely stunning! Our guide (Sonam) was funny, extremely prepared and knowledgeable. Plus nobody had any issues with AMS. Book with them if you want an unforgettable Nepalese experience! I am already planning to come back and will book with them.