Sky Priority is one of the main reasons I invested my frequent flying efforts in SkyTeam. It's something that is really great and works perfectly (if you can fight through the crowd to Sky Priority - I once had some stone deaf (not) uncomprehending (not) elephant blocking the way and I couldn't get past him). The consistency of the SkyTeam benefits is the other main reason (compared to the nonsense Lufthansa offers - or doesn't).