Went twice in the last couple of months.
First time, was in the 2nd sled in the back on the left side....very very jerky. Hit my knees multiple times on the sides ( and I am only 5'4") and had a horrible back and headache after.
2nd time a month later, went on the right side, and sat in the front car in the first seat. Plenty of leg room, and a much smoother ride. I did find there was strange and abrupt jerky ' break checks' but couldn't figure out if that was a slight malfunction or a new part of the ride.

my dad was in the back seat of the first car, is 5'8" and had an extremely hard time getting in and out of the small seat.
I guess it all depends on where you are in the sled. Personally, I like not sitting in someone's lap and run the risk of banging my head on the front of the sled. However, I don't think the new sleds were measured correctly as it seems the seat width is different in each position of the car.