Pros
There are some good people working at Ex Libris. The really excellent ones don't stay around too long. Dress code is very casual.
Cons
Atmosphere of a start-up, even though the company started in the 1980's, but with none of the benefits of a startup. Frantic, unrealistic work schedules. Complete and utter inability of upper management to set any priorities, whatsoever. There is only one classification of work at Ex Libris: emergency! If there were a motto here, it would be: "There is never time to do it right, but there's always time to fix it." (That time to fix it will 100% be after hours, weekends, etc., which is frustrating. Very few, "emergencies," would ever happen if anything were ever done correctly in the first place, but there's no time for that, and higher management simply does not listen to anyone).