Closest to GMAT official Prep Tests

I have tried Veritas, Experts global and official prep tests. Official tests are surely the closest thing to GMAT, but expert global’s test are also on similar lines.
The question patterns closely follow the official tests in all 3 sections.
One disadvantage though is that the tests are not adaptive, so if you are already in the 700+ segment and aiming for higher, the tests might seem easy and you may get inflated scores.

Also, as it goes for all tests, never take the tests back to back, otherwise you will definitely get inflated scores.

The gmat shots are also useful, small videos with to the point explanations.

Overall the best value for money test series - 15 mocks for 50$.