Had a BOGO coupon, so we went up for $10 in the daytime. The view is great and you can see the entire strip from end to end, from the Stratosphere all the way to MGM (and the tip of Luxor behind it).
I only wish I had done this during the nighttime though, so I could've seen the Bellagio watershow from directly above. Otherwise, $10 seems a reasonable price for 2 people. Something good to do once in vegas, but prob not again.