fit2inspect,

I took the Radiographic Interpreter course 2 years ago at Hellier in Houston. I was most impressed with their facility and the Instructor. FWIW, I also took the Level I and II UT at Hellier in Connecticut (2 weeks later) and also have nothing but praise for the quality of their coursework. Yes I learned things (RT, I still have zero hands on in UT) ) in that class that greatly aided my worth as a field QC in the power and petroleum industry.
Sadly though, I did not do a follow through and get the RT endorsement, as was "The Plan". If and or when I return to the aforementioned projects, I fully intend to retake the RTI class (at Hellier) and immediately (prescheduled the next time) take the AWS endorsement exam.
Having been to 2 of his facilities (If you go to Connecticut, you stand a good chance to meet one of QC's legends, Chuck Hellier as I did), I can say that it is excellent and have never heard of anyone not getting their $$$ worth.
As far as NDE work goes for me...my hands on experience is to call ACUREN or another local provider of such services.
I recently (2/21-25th/2011) took Level II coursework in MT and PT in Webster, TX. The school was good, but would have to say something was lacking. Maybe it's because I paid for the former and the latter was company sponsored?????

you better look at the requirements you must meet in order to qualify to take the test.
you'll find it on the aws website under certifications