Pros
interesting problems to solve,
standard benefits package,
fresh fruits every week,
free meals when celebrating IT related holidays (sysadmin's day, programmer's day),
events encouraging teams integration (at least 2 yearly),
no open space,
overall good working conditions
Cons
a bit dated technology (Perl) which doesn't allow for having marketable skills (e.g. for fresh university graduates),
lack of AC in office