So, though I think most of what needs to be said has been said - I thought I would add my 2 cents after riding the Skyliner this weekend.
We did 4 rides each with a change at the CBR station:
-DHS to Epcot at Night (10/26)
-Epcot to DHS mid afternoon (10/29)
-DHS to AoA late afternoon (10/29)
-AoA to Epcot early evening (10/29)
The ride from Riviera to Epcot timed at 8 minutes, From CBR to Epcot was probably around 12 minutes. The one from CBR to DHS is about 5 (didn't time it). CBR to AoA/Pop is probably under 5. Definitely faster from DHS to Epcot by Skyliner than boat.
The heat is no problem at ALL. We rode in the heat of the day yesterday with temperatures around 92 degrees and heat index at 101, and the cabin when moving felt about 75 degrees. When slowed at the turn or Riviera, more like 80 but still not bad.
Mostly rode it just the 4 of us and it was a walk-on. Once there was a back-up at DHS - probably about 100 people - because it had stopped, but it started as we walked up and we were loaded in about 2 minutes. At CBR in the evening yesterday there was a backup of maybe 200 people to get to Epcot, but even that loaded in under 5 minutes. AND they were sending some empty cars as well for the Riviera station pickup. We never saw anyone at the Riviera station, so I don't know if they were just trying to be in the routine.
At one point we were waiting for a bus at Boardwalk - and a bus pulled up that said "Skyliner" where it usually has the park name and then said "CBR/Pop Century/AoA" bus driver told us when asked that they run the bus when the Skyliner is down - so FYI if you get stuck at the back of Epcot and need the Skyliner to get back to your resort - you can go to Boardwalk rather than the front of the park apparently.
If you want to take pictures/videos - make sure to ask for a car without the wraps - you can see through the wraps, but it somehow disrupts videos.
Noted that it goes VERY high over the CBR resorts - much higher than over roadways and parking lots. Clearly this was to try and minimize the disruption to the resort.
We did see a pretty big line-up at the Skyliner after Epcot Forever. However, it was moving nicely. I would've guessed maybe 400 people in line, but likely wait was 5-10 minutes. We were at Boardwalk though so we walked back.
The biggest disappointment was that they didn't move the security stations to the Skyliner, so when you go to IG you still go through security and ticket scan. They were still constructing here a bit, but they only had about 60% of the stations open, and while the backup wasn't terrible, it was a little worse than it used to be. Probably took 2-3 minutes to get through bag check and another 1-2 minutes through the scanners. If all the stations had been open it would've been fine for crowd control I think. We didn't ever get there for rope drop, but since typically the IG starts letting people in pretty early and then holds them in Canada, it's probably not an issue in the morning. The entering crowds at 10:30-11 AM were no issue at all.
From the people we talked to about it, it was a HUGE hit. People at Pop and AoA absolutely loved it. I don't think we ran into anyone staying at CBR so I don't know.