I have one and I was very happy with it. It's been replaced by an Esstac Daeodon ASS, which is much more comfortable, but also much pricier. I'm keeping the GGG minimalist is a backup carrier. I only used the GGG for one year, but it got a significant amount of use.
The shoulder pads are not easy to adjust on the fly so I adjust them and keep it there. As with most carriers you really shouldn't adjust the shoulder straps once you have it configured for maximum coverage. Some have voiced concern over the plastic d rings on the straps, but they seem sturdy enough and have held up well for me.
The side straps held up great, can be cinched down easily and the elastic is thick. They allow for movement and still allow you to breathe if you over-exert yourself. If you are very skinny or very fat you may run out of adjustment though.
The exterior upper pocket is more of an admin pouch and it is not easy to get items out of it. The opening is small and narrow and the pocket is deep. I would not put a TQ in there because you want that out fast.
I think it's an awesome carrier. I paid $80 for mine. If you treat this as a minimalist carrier you will be happy. Stick a mag shingle on the front, TQ or IFAK somewhere and you're set. It's quick to get on, very comfortable, and very light. I really liked the breathable lining. I was running in VA weather with it and it doesn't feel as hot as other carriers. Not as nice or nearly well-made as my Daeodon, but not $240 either.