I saw it here this spring in Seattle but I didn't have crohn's so I was unable to look at the Intestines in the manner that I would've if I saw it today. I was up close and personal with the arteries and veins tho. To give you an idea of the detail that you see, they have an exhibit with just the arteries and another one with just the veins--facinating.
I definately recommend it. However, if you are a queasy type, you might want to bypass it.
If you are not in the medical field, this experience will be the closest to doing surgury on the real deal that you will get. =0)