Must have for quant and RC

GMAT club quant test are must have for quant practice. Don’t worry about the low score at the beginning. The questions are challenging but once you get over it, you are almost guaranteed to get Q48 or higher. It just covers so many angles.
GMAT club verbal test: I read some reviews on it and most people points out many flaws in it. I too agree that scoring mechanism could be improved. However, I found it really helpful for reading comprehension passages. Before the using gmat club verbal tests, I did not have confidence at all while attempting RC passage. My accuracy was around 50%. However, now I hardly get 1-3 wrong here. I would it say it must have for RC passage and build the stamina for verbal section.