I got there today at 7:30, & I think they were already letting people in at that point. Once in, it was 7:45, with a TM leading the crowd over to Transformers, than stopped the crowd just after Monsters Café. & said. "HRRR is open right now if you wanna ride." & everyone just litterally laughed, no one moved. Than, when she let us go, right after turning the corner, there was a poor girl on the ground having a seizure, with TMs running over to help. I hope she is OK.
Me & my GF got on in about 10 minutes on stand by, than went single into single rider, & that's when everything started falling apart. So after being open not even 20 minutes, they announced they were having technical difficulties. Even still, we decided to wait. Than I heard the "We've determined this will be an extended delay, but you can still wait in line if you want, or exit at your convenience." We waited anyway. It finally came back up after an hour later! So we rode twice.
So on my second ride, right after being caught by Bumblebee, the RV was facing away from the last screen that shows Optimus thanking you, but we could still hear him, so nothing major, & my GF said the last minute of here ride had no audio. So after our second ride, I went back through the gift shop exit to see what pics I could grab & already saw the RVS piling up, & knew what was coming. Than after coming back out, I once again heard the "Extended delay" announcement. So we went & rode Mummy, came back, line still hadn't moved, so decided we had enough for the day. I think it was around 11 right around when we left & the line JUST started moving again, so after being open for 3 hours, there was at least 2 of those hours with the ride being down, hopefully they will get this fixed soon so they can have better success at trying to run it all day. With shorter & less frequent delays.
So Id say that if you don't see the line moving when you get there, especially if people are sitting on the ground, Id go do something else, & come back later. You can also see for yourself what's going on by going through the ride exit to see if the RVS at are a stand-still or not. So I conversed with the ride exit TMS while waiting for the ride to come back up for a bit & told them they are doing a great job, they were all great.