"It was good." Cooke, '05
Need we say more. For us, a flying visit (just over an hour in Pisa) was more than enough. The first impression you get on seeing the tower is not, as you would expect, "Wow, that tower's leaning," but, "Holy shit, the leaning tower of Pisa isn't the only building around." In fact, it is part of a cathedral complex. Work on the tower was started in 1173 and took almost 200 years to complete. The tower was not designed with the intention of leaning, but during construction, it started to tip. At this time, it was shored up, and work to keep the tower from collapsing has continued as recently as 1999, when engineers made the soil underneath the tower more stable in a desperate attempt to halt the imminent collapse.
The leaning tower is definitely well worth a look if you're in the area, but we didn't see anything that would make us want to stay longer.