My first impression of the pack was positive. It's light weight, the material they use looked and felt like it could withstand many miles on the trails. At 2 liters the bladder is of decent size too.
I was somewhat intrigued by the inclusion of a waist pack and was anxious to see what that was all about. Unfortunately, I wasn't impressed. The pack can be removed so that's a plus, but when it's attached it sits at your back and not easily accessible while on trail. It also creates a double waist band too, one band for the larger pack and one for the waist pack.
There are no chest straps like there are on my other running vests so there seems to be a lot of movement when I run. I do tend to have a lot of shoulder movement so that may have exaggerated the slipping feel.
Like I said, the bladder is nice and large but the fill point is rather small. It's large enough to slip in ice cubes but the screw on cap limits the overall size of the hole. I lean more on liking the large open mouth that bladders sealed with slides provide.
I wish the pack additional pouches/pockets in the from off the pack. They're all located in the back so getting to items while on the run just doesn't work.
I really wouldn't recommend this pack for runners. Hikers and walkers, absolutely. It just falls short when compared to high performance gear from other brands.
Here's a link to the item: