The exhibit is cool and the photos are absolutely amazing.
I think its worth a trip to Houston if you can tie it in with something else (visit friends/relatives, BBSP, something!). I went for a third time on Wednesday when Carl's JR was giving away free burgers
OH,... Since Monday is the last day youll have to decide quick... they do Farmers Market on Sundays 1-4pm but then again the weather isnt looking too good. Check the calendar
Discovery Green
If you do go, dont forget to stop by the Red Bull tent and pick up a pair of 3D glasses and a free copy of the small softcover book. It has info on the 50 images on display, backstory and technical info. That one is free. There is also the hardcover book (limited to 5000 copies) selling for $40. It has 250 images and it really nice.
Very good coffee table book.