Yes EE is open. I also rode it during a soft opening. It's a very fun ride! You go forwards and backwards. The backwards part can be a little intense, but definitely managable. There's only one big drop, which you can see coming out of the mountain. The yeti, which you get to meet is VERY realistic and amazing!
It's a great ride. It has the smoothness of RnRC, but it would be more accurate to compare it to BTMR, only with more speed.