It seemed quite tough at first because i am a fresher in this. But, this site made me realize anything can be achieved if we work hard and i did. I enrolled on the site for practicing Oracle Linux Administration certification simulated tests. The site gave me unlimited access for 2 months which was enough to polish the knowledge and revise the syllabus. I gave the exam last week and am quite happy that i came across this site to study for 1Z0-100.