I just got back from a Fri/Sat
Disneyland trip. We were successful in riding ROTR and I appreciate everyone's research and commentary leading up to it. I'll add my own.
GETTING IN: We left HOJO at 6:35 on Friday and (2 adults) walked briskly to security, where lines were short and we were through by about 6:50. CM looked through my cross-body bag verrrrry thoroughly. Lines in the esplanade were about halfway back even then. I took this thread's advice and we found a center line. When the lines got almost back to DCA about 7:15, they opened the gates. Our line split at opening so we got in pretty quickly. No photos taken. I made a MaxPass reservation for Space Mountain to verify we were both considered inside the park. They held everyone on Main Street until it filled, then held everyone at the individual land rope-drops until about 7:55 a.m. We chose to stay between Plaza Inn and Star Tours as we had a good cell signal there.
GETTING A GROUP: We closed everything before 8:00 and launched the app 5 seconds before the hour. It was all a blur at that point, both of us poking the buttons until I got in!!! GROUP 42!!!

I should probably mention what big Star Wars fans DH and I are and how badly I wanted this to go right. Huge relief to get a lower group. The atmosphere listening to everyone around us was unique and fun. We were both on verizon cell service, DH has an iPhone 8 and I have an iPhone 10.
WAITING TO RIDE: It's probably a good thing I was offline all weekend and didn't know til later how few groups they got through on Friday or I would have been more worried. We knew it was a delayed opening. We checked on the progress throughout the morning as it finally opened and inched up. We got called right around 2:00. The line took about 30 minutes and we experienced the whole attraction seamlessly as far as I could tell (I avoided spoilers).
MY NO-SPOILER REVIEW: VERY awesome. I really need to ride it again to take everything in. My father asked me later what kind of ride it was and I said "all of them," which explains nothing and everything. This was our first visit to SWGE and we also rode MFSR twice. DH got to pilot the Falcon, bucket list item checked. And got a legacy Luke Skywalker lightsaber, check. We both liked our Ronto Wraps. Oga's was meh for us but I'm glad we did it once.
Good luck to all who are trying to experience this, especially over the busy spring break season. It's worth it.
PHXscuba