I got free Veritas CATs with GMATClub Premium membership. I found their Quantitative section most relevant and helpful but their verbal section is bit on harder difficulty level as compared to real test. Secondly their verbal tests quality is not up to that par. Especially RC section is harder and passages are a bit longer in length. SC section do not replicate real test as well. Though CR section is quite relevant.
Moreover veritas CATs scoring algorithm is not preferable as i found that despite of attempting most of the questions right you still end up getting low score.
Nevertheless, veritas CATs are great source to build stamina and to get yourself aligned with real test.