There are surprisingly few harnesses where i wouldn't change a thing, but this masterpiece of modern design and engineering is one of them.  Not only incredibly light and compact it is supremely supportive and comfortable, has full length inflatable back protection, a tonne of vol biv storage, adjustable ABS for user defined stability, a huge and very stable rear tail for low drag and yaw stability, a streamlined front container which gives a proper rigid flight deck, chest pocket, superlight ergonomic bullet like speed bar, the list goes on.  It's a gem and a tick in every box, you've seen them around now, if you haven't checked one out in person get on it, it's the only harness you need for XC, vol biv, hike and fly and stable enough to fly high end gliders, it truly does it all.