I found some problems with this site. Sure, the old tests are maybe okay to put, but what about tests for the online course which must be paid for, not mentioning the guides being there too?
Definitely not.
Legal, yes, as long as they aren’t violating copyright laws, etc. Whether the tests are worth your money is a different question entirely - I would use official CB tests if you haven’t already.
They’re sharing copyrighted CB tests, @MITer94.
Scanning copyrighted CB tests and uploading them? illegal
Downloading? Semi-illegal, but thousands of people do it and NO ONE has gotten caught/reprimanded for it.