mostly useful. I prefer these exams over exams from other providers

Pros:
- Enough CAT(specially for Quant) to prepare (You won't need more than this)
- a lot of High Difficulty Level questions
- Good environment for practice (you can zoom it to fit your screen and then press F11) 👌
- Graphs and stuff


Cons:
- Limited Verbal CATs (I am going to reset the exams to practice verbal more)
- No RC questions in the last 2 CATs (but I guess it was a glitch)
- sometime not enough OG like detailed explanation
- People arguing and doubting the answers making explanation of answer confusing. (I am not saying they shouldn't, it just makes you doubt the validity of the explanation)


👍 I recommend GMAT CLUB tests over tests provided by any other online service however there is always some space for improvement.