Pros
Turner provides both in-person and on-line training to all of its employees, the benefits package is good and many of the people who work there are very knowledgeable and helpful. If you can find the time and the energy (long work hours are common) to take advantage of the optional training, it will only improve your standing with the company and your hireability elsewhere.
Cons
Turner is a very top-heavy corporation, at least in the Northern California region, so there is a lot of pressure on those working in the field and managing the contracts to produce a large quantity of work to pay for upper management. Although many people have been layed-off in the past year, including people who only worked part-time, the operations managers and project exec's (now "construction managers") remain.