We're currently putting our customers on 5.5 MR 3, as we were advised by a few Micros vendors (as well as this forum) to not go with 5.6. I saw a site today that's currently running 5.7 MR5, and I know that 5.7 came out some time last summer, so I'm curious if Oracle's been actually putting in work on this version and making it worth using.