First of all, I wouldn't really consider this an "attraction" its more of a "curiosity".
If you find yourself in the general area and you have 15 minutes to kill, stop by. Otherwise you're going out of your way to see a few lions sleeping.
I admit, lions are not something you see every day and the opportunity to see even one (despite the fact that it's sleeping) is fairly awesome. But you arrive, wait patiently for a spot close to the glass to catch a glimpse of one, take a photo and then you just kind of stand there. And then after a minute of that you start think "Wow, these are seriously beautiful creatures. It sucks that they're stuck in this artificial environment getting gawked at all day." I felt a little dirty afterwards.
I will say the habitat itself is beautiful! 9 million dollars worth of beautiful.
There's also an informative recording that plays every 5-10 minutes. It tells you about the habitat, the lions and gives helpful factoids. One of which was: Lions sleep 18-20 hours a day. They are not dancing monkeys.
To view the exhibit itself is free, but if you wanna shell out $25 bucks you and one other person can get your photo taken with a lion cub.
I'm not gonna lie. They were reeeaaalllyyy f***ing cute!