I went in January 2018 for a 8 - 10 pm EMH. I would say all of the headliner attractions (SDMT, Space, BTMRR, Peter Pan's Flight) had anywhere from 30-45 minute wait times for most of the time during EMH. This is what was shown on the wait time screens at the rides so it may have been shorter, but I didn't use EMH for the headliners. However, all other rides like Pirates, Haunted Mansion, IASW had little to no waits. I would say EMH is good for hitting the mid tier rides and choosing one or two headliners at the end of EMH. BTMRR was a walk-on right at the end of EMH.