Very surprised by the efficiency and comfort of 2 full days with eos 6d with grip + 70-200 f2.8 L series USM2 and eos 70d + 24-70 f2.8 with grip USM. So there has weight, nearly 6kg for all. Well no neck or back pain. Handling is quite easy and it remains comfortable. I put 4 stars because I found a pocket or two to put integrated memory cards or other small accessory would be welcome. A buy eyes closed.