Forum Quiz

Strengths:

Quiz lets you set your own difficulty time and practice section wise questions or all of them together.
It’s a really good way to go through gmatclub questions in a structured manner

Would make the product better:

Not all questions are GMAT worthy. Some questions are completely absurd and tbh for a paid product it’s not a good look

Personally I would recommend it if you want to you use on day to day basis just to practice questions. However if you want to score better you may wanna give GMAT club test a shot as questions here are not always GMAT quality.
This product does let you set time and adaptive nature of test which is really helpful.
You can go through the review and time yourself which lets you work on your timing.
Apart from that you also have flexibility to either set only one section or multiple section questions to simulate a real test of 2hrs