ANN ARBOR, Mich -

It's been three years since the University of Michigan bought a 2.2-million-square-foot complex that previously was the property of pharmaceutical giant Pfizer.

The move was considered risky at the time.

Now, it's being hailed as a triumph for the Ann Arbor school.

The 28-building, 174-acre complex known as the North Campus Research Complex cost $108 million.

NCRC executive director David Canter tells AnnArbor.com officials "took a risk" because occupants were not lined up.

University President Mary Sue Coleman says she considers the acquisition of the Pfizer complex to be one of the top accomplishments of her tenure, which began a decade ago.