Question is if it now will work with other carriers as well, e.g. LH -> SK Domestic. I guess it will. A friend of mine reported that it worked OS -> SK (he waited in vain at T5), but that obviously must have been a mistake on the ground handlers.
ARN needs some more Starallianceness for sure. I miss the days when you didnīt had to care about if the flight was LH or SK.