The core pack of the R8 is an amazing waterproof, comfortable and well designed backpack (I used the 40L). Tons of good looking attachments. However having used all of the attachments over the course of a year I found that more often than not I would leave home with only the backpack portion. Simply put all of the attachments are very bulky, heavy and just too specialized for my carry needs. I’m sold on the backpack but not all the attachments.