3 days 2 nights A very intense climb. First day, trial under the sun and a short transition over 6 hours, breaks in the shade and for lunch. Accommodation in a tent and dinner in the first camp. Second day. We started to the summit at 2 AM (less than 3 hours of sleep), after a very light breakfast. Climbing and descending to the summit took 5.5 hours (be sure to bring poles!!!) After returning, another light breakfast, an hour of rest, and we began the descent into the crater. The hardest part of the hike in our opinion, descending a pretty challenging section, especially after the legs got sore from the first day and the summit climb/descend. About 3 hours descent to the lake, lunch on the shore, the hot springs, unfortunately, were cold due to the season. After about an hour of rest, we started the climb to the Senaru caldera, 3 hours of constant ascents and descents, a difficult route with ascent right into the clouds. Legs nearly stopped moving. The second day turned out to be about 13 hours of constant movement and 15 hours on foot. Followed by 9 hours of bad sleep and the last day. Third day. It should be noted that because of immense fatigue and movement beyond possibility, I began to experience a state of shock, lack of appetite, bathroom problems, shaking, and poor sleep. With great difficulty, we woke up and began to descend into the jungles of the village of Senaru, which took about 5 hours, from where we were picked up by car and returned to the hotel. Clearly not enough food and snacks, per day if there was any appetite at all, we ate 2000-2500 kcal, but it felt like we spent 4000-8000 kcal depending on the day. It's worth taking electrolytes and a lot of Snickers, about 10-15 pieces. You will enjoy the food on the first day, the second and third will make you nauseous and completely lose appetite. Decent toilets are only available in the first camp Sembalun, beyond that only bushes or a special tent where you will sleep. As a fisherman, I recommend bringing a fishing rod to cast for an hour in the crater of the volcano at an altitude of 2000m :) The hike is extremely challenging, especially the second day being 15 hours on foot, if you're afraid, it might be worth taking either just to the summit for 2 days 1 night or 4 days and 3 nights with crater visits. The ascent to the summit is much easier than the descent into the crater afterwards, so be sure to bring trekking poles. Despite everything, I enjoyed it. I would definitely repeat, but bring my extra food and snacks. Regarding MyBaliTrips, poor communication, practically no answers to questions, had to find everything on the supplier's website. They promised between the lines a transfer the day before the start; after payment, it turned out they would pick up only on the day of start.