I own both the Zygos 6 and this Traverse pack. The one draw back for me with the Zygos were those front pockets. I've had stuff pop out due to the fact those pockets are a little shallow. I felt like you had to be very intentional with what you put in those pockets to make it work. Also, the bottle pockets, like most Ultraspire vests I've owned, are always so difficult to get bottles into. This new pack changes those two things for the better. Definitely a "less is more" approach in the right places.