Pros
Express is an employment agency, offering long and short term assignment's The local staff is amazing, and appreciative. I've had assignments as long as 9 months (paraprofessional in Special Education) as well as some short one (single events to two weeks) and they always give you the support needed, including a listening ear and encouragement when needed. They also help with resumes and long term job searches. They also do temp-to hire, which can be a great way to get your foot in the door. You can get a $25 referral bonus for qualified hires as well. There's a lot of variety in what they offer, which can really help keep you fresh while looking for the right fit. I worked for Randstad while living on the West Coast, they're often cited as one of the best in the world for this type of service. I would wholeheartedly state that the Lawrence office meets or exceeds any standard set there or anywhere else on a regular basis.
Cons
Hours vary, depending on assignment, since you are a temp you don't qualify for benefits. That's part of using any temp service however. As long as you keep your expectations realistic, you shouldn't have any issues.