Easiest conditions i ever had, not too cold and water level 200/250 l/sec. From 8 years ago the glacier has gone back at least 200 meters, it was fantastic before when you started from the glacier end right in the canyon. 4th time for me in this canyon. Some waterfalls have changed, be prepared tu put some anchors. There is a renovated trail to reach faster the start, use it if not too much snow or ice, you will see on the trail an anchor with a yellow sling and a rep wood pole, excellent work from local guides.