My employer wants me to get this certification.

To to those who already have taken it: how difficult is the test?

Is it worth to go to a class or can I prepare myself with just the Code?
When I took my API 570 test I just studied by myself and had no problems passing so unless the test is very hard I believe I can do it.

I'd like to know what your experiences are.

Thanks in advance.

See More: API 580 RBI test information