Advanced certification in ABAP

Hi All

I am a ABAP programmer with 3 yrs of ABAP experience and currently working on EDI / IDOC technologies. I wanted to go for ABAP certification but I was advised by many not to do it as exam has got very simple ABAP questions, mainly on Basic ABAP

I just wanted to know how true it is and is there any other certification for Advanced ABAPPERS ? ( Like Sun has for Java ).

Are there any certification exams for ALE Idoc , BW programming.

Amol