Went here with the boo and some friends on our weekend excursion in Vegas, and I loved the experience! If you have a fear or heights this will make you shit your pants.
The cost is average, but it's worth every penny. I recommend you get the pass that let's you ride all three rides. All three attractions are excellent, and they really push you to the edge both physically and psychologically.
There's not much else to say except that if you ever visit Vegas and have thought of visiting the Stratosphere, do these rides, you won't regret it!