When we are looking at the Pros and cons there isn’t much anything bad to say about this water block you are increasing the lifespan of your GPU, performance gains, and it wont heat up your room. The only downside would be the pricing because you will need everything from the RTX 4090 water block to the whole liquid cooling kit to make this work, but in the end it is worth it.
EK-Quantum Vector2 FE RTX 4090 video: https://youtu.be/Cte0pfR9C6c