Some of my friends love working their contracts and buying their own health insurance, retirement planning, etc. They enjoy the option of leaving when they get tired of a work environment. They wait for their assignment to end, and they move on to the next pharmacy. $ wise, it's not a good deal. They often get paid less than the benefited employees.
The big advantage is...it's an opportunity for you to interview the work environment. If it's a good fit, and they have openings, there's a good chance they will ask you to stay as benefited staff. If you don't like it, you move on. I think it's a great place to start.