Vantaggi
Work life balance: there is little or no need to stay late, as things are completed at Commerzbank's pace irrespective of who the client is. Staying late won't be rewarded, so inherent culture (understandably) is that people don't Very unlikely that you will get laid off (unless there is a macro event such as the Dresdner takeover)
Svantaggi
Deeply, deeply bureacratic, hierarchical and institutionally set up so that employees are not incentivised to stick their necks out for the sake of good business opportunities. There is little or no point in non-German business areas and the prevailing culture is one where juniors are conditioned to assume that their superiors will take a negative view of new ideas, hence themselves also take a negative view. This is not a place to further your career