Are you unemployed/underemployed? If so, then Copa might be a good SHORT TERM job opportunity. As an expat (especially gringos), you will never really have more than 12 months job security here anyways. Never listen to what HR people tell you as they truly have no idea what pilots do.
If you like Latina women and you want to make a little money but realize that you will not get back to your home country much, then this is a decent place to work.
New, clean aircraft with good maintenance and nice cabin crews. They feed you well when at work and the hotels are above average in most cases.
What others have said here in this thread is pretty accurate.
YMMV