I've flown in about 20 times now from the North and South and it seems to be working okay. The first few days we were flying a lot of the STAR but as the transition process has happened progressively we have been getting great shortcuts even as far out as Jacko. We are defiantly flying more track miles but it's too early to tell about fuel burn due to being at higher altitudes whilst flying the extra miles.
The departures have been great usually getting at least FL70 or above shortly after levelling off at 3000' on the Ekniv 1A SID.
All in all it seems to be working well so far, and I'm sure it will only get better as the controllers get more experienced with it and work out the shortcuts.