Passed JCNIA today, on to JCNIS-Sec. I agree with what other have written, it isn't a hard test, esp. if you already have pretty solid networking knowledge. The free materials from Juniper are enough, as long as your existing skills are reasonable. I only studied the pdfs maybe 6-8 hours, with another 2-3 hours with 2 router images in junosphere (trying to save my credits for SRX images for the -Sec). I know Cisco is way more popular, but there is still a lot of Juniper shops as well. I didn't spend much time with Cisco IOS, but JunOS seems better to me at least. Also, as part of the fast track program, the test is only $50 if you pass a pretest, so it is a very good value, esp. when you consider the free training material. There is also free material for JNCIS-Sec as well as a discounted test.