Careers360 is a very reliable and good education site.
This site mainly contains information about NEET UG, JEE MAIN, CAT. One can ask any question about those examination in this site and they will provide the proper reliable information.
The thing for which Careers360 is famous is the rank prediction. All the examination mentioned above are competitive exams so they predict probable cut off marks, and ranking on basis of marks. And their prediction is very reliable which matches with the original.
This site also publish magazine and provide important e-books for those mentioned exams.
Overall it is a very helpful education site.