Pros
Depending on which primary investigator you work for, you may have opportunities for getting your name on some publications. Depending on the research protocol and the number of other (competent) research assistants working on the task, hours can be flexible to accommodate courses or doctor's appointments, etc. Some primary investigators will pay more if they really want you, but keep in mind that the pay-scale is set by HFHS so there may be a negotiation cap, unless the job title is re-submitted to allow a higher pay scale.
Cons
Realistic opportunities for publication exist mostly for research assistants with either no goals (they think you'll stay around longer if they are given a glimmer of hope of being acknowledged) or those wishing to return to school for a PhD in the sciences (because they want to encourage you to eventually work for them as a Post-doc). Again, though, this is quite primary investigator-dependent. Be forewarned that there are a handful of wolves in sheep's clothing among your peers, so don't get too overly cushy about your personal life with other research assistants. Enjoy their company, but don't join it.