Well it has been a while but...here are my thoughts on the Onyx w/ rope bridge.
1st hour out of box - I hated it, and so did my jewels.
2nd hour, adjusted some straps - slightly better but still not happy
3rd hour, more adjustments - okay but still not as nice as my Treefox was out of the box
4th hour, ding, ding, ding, hung both harnesses side by side and adusted straps to match. Duh..
Got about 40 hours in it since then mostly rec climbing, and some dead limb trimming of ice damaged stuff.
Love it now. Bottom line is adjust it until it feels right and maybe start by hanging your old comfortable harness next to and start there.