I hesitated with the model "slingshot" but after trying it a weekend, I opted for the opposite because I could not distribute the weight with mono strap of the backpack. I just tested the new bag on my vacation, I am very satisfied. good weight distribution on the hips, very comfortable belt. opening the top is very convenient to access the hardware without having to pick up the bag. and if the need arises, we can relieve the burden on the hip by the shoulder strap that is provided (I had to shorten turned down because it was too long) Excellent product.