We went to HS AH on this past week, May 17th. It was amazing. We didn't wait in any lines. Some showed wait times but by the time we walked through the queue, we were in the next loading group. We did not do Slinky during AH, since we did it between the 7pm - 10pm time.
This was our only park time during our visit, and just two adults, so we splurged a bit on an ILL and
Genie+ to maximize the 7-10pm window. We were allowed to enter HS at 6:50pm, which let us go meet Darth Vader, since it closed at 7pm. We waited about 15 minutes there. After that we had Genie+ reservations stacked for the 3 hours, and we managed to ride every ride during this time.
Then we slowed down our pace during after hours, looked around, enjoyed snacks, and rode everything again, except Slinky. We even rode a few things twice during AH, including Rise.
It was a great experience, and really neat to experience the park after dark and with less people. The front still felt a little crowded walking around but Galaxy's Edge was empty. Overall, I highly recommend this!