I personally enjoyed the entire boarding group experience. I see a lot about people complaining they have to be there early, and they couldn't be more wrong.
Everyone shows up early to get in standby for Smuggler's Run. Those who show up early for Rise are mistaken if they think they gain anything from it. Whether or not you show up at 5:00 am or 7:00 am, you have no better chance of getting a boarding group. If you are in the park when the clock strikes 7, hit the button on your phone, that's all.
As for the experience of the ride, it was amazing. Nothing short of amazing. It is a true well-rounded experience. I was very satisfied and made sure to ride it 3 times in the week I was there. Again, just showing up at 7:00 allows me a boarding group, so it wasn't an inconvenience to stop by HS at 6:50ish to get in the park, get a group, and then go to another park while I waited for my group to be called or something. I love the system, it works well. Of course those that join a boarding group and sit around waiting for it to be called will be dissatisfied, they are using the system incorrectly.
Also, pro tip: don't use the wifi. Each time I'd use cellular data and got a group under #20. That wifi gets bogged down fast.