I've only been on a couple drop towers, the tallest one being at Six Flags America. But, I found the ride to be lame. It slowly pulled you up, and you sat at the top for a couple seconds too long. Then, just like that you hit the brakes.
My favorite that I've been on is a maybe 50 ft high Moser tower. There's some awesome airtime, and the restraints were really loose.
Lex Luther looks awesome! I hope I can ride it in the next couple of years!