I feel like the content provided by nwexam.com was worth the money. I've sat through the official Juniper Training, went through the modules and sat through the voucher assesment test modules qualifying for the test discount. When I sat the JN0-637 exam the first time, I did not pass on my first attempt. The exam questions likely required a deeper understanding of the content than I was prepared for. NWEXAM study materials helped to provide areas of study from a different perspective, which I feel, was able to help me pass on my second attempt. Given, I'm not a security person persay, so I've never dug deeper than scratching the surface of the processes involved in security. NWEXAM did a good job. I felt much more confident in not only taking the exam, but understanding the concepts taught through their testing engine. I had a feeling of, "I passed this test" before clicking the button to submit.
Thanks NWEXAM. Going to try for the JNCIP-SEC exam next.