We rode them for 5 out of our 6 days, we arrived opening day, the 29th, at AoA. We loved the Skyliner. We went home day of the incident. They are so smooth, and quiet, and just plain FUN. I was sad the one day we did not get to "fly" (AK day and laundry night).
Thursday night, 2 days before, we were on the Epcot line after park closing, after the Frozen dessert party. We were stuck for 35 minutes over the highway, where the Skyliner is very high. There were 4 of us, me and my son and a mother/daughter (strangers to us). We all did ok. It was weird when it tried to restart 3X, and stopped again after a few feet. We were all laughing and joking around. I was sharing the special snowflake glasses from the dessert party. We rode again the next night, (night before accident) just to get ice cream at Boardwalk, and then back to AoA.
I would ride again tomorrow. I will specifically book hotels that are on the Skyliner line (when I can, we use both cash and our DVC points, so not always possible). Overall, it made me feel less remotely located than I usually felt staying way out at Pop or AoA.
Edited to add, they only felt warm in the hottest part of the day, and there is a good breeze especially if you are facing forward. they rarely loaded up the cars. Usually me and my adult son were alone (he also has a large stroller/WC that I would push on), other times 2 additional people, only once we had 4 others, 2 being kids. But the line moves so fast, it is preferable to waiting for a bus that you just missed in 90+ degree heat. And they are actually vented on 3 sides.