Pros
The bank will allow you to personally develop your skills sets as far as you want to go. It will support you in acquiring all the licenses and registrations that you need. It also has a decent tuition reimbursement program. My particular unit (24 Hour Execution Desk-Chicago) has an excellent desk manager and branch manager. I was treated as a professional and with respect. Insurance benefits weren't bad compared to other shops at which I have worked. I would return to that group in a heart beat (see below).
Cons
When you're receiving company wide e-mails from high ranking bank officers alluding to impending layoffs you should probably give them credence. They announced a 13% across the board head count reduction and I, along w/ one of my colleagues and the Co-Head of North American Futures Sales, were all "separated from the firm" in the same morning. When they want to cut fixed costs competency, a good work ethic, and loyalty didn't really mean much. They didn't offer us a chance to apply for positions in other units in the Chicago area. We have to go on to the company website and apply for those positions ourselves... just like outsiders.