I rode it on the 1st. We had heard the buzz around the park that it was open, so we went over to Tomorrowland around dinner time, and it was 'temporairly closed' so we decided to have some dinner and check back to see if it was running. Sure enough, it was. Wait time said 75 minutes... was not that at all. Less than an hour, i'd say around 50min. Woulda been shorter, but it was shut down for 10min. That helped, for alot of people left the line.
I had never been on the original, but I have been on WDW's SpMt. And I liked this one much better. So much smoother, and it was basically complete darkness, which I like. In WDW, you can see most of the track and I didn't really like that. Here, you can't so it's even more unexpected where you go next!
So happy we decided to wait for it!