One science fiction universe with exceptionally fast FTL drives is the "Hyperion Cantos" series by Dan Simmons. In this universe, characters utilize a technology known as "Farcasting" to travel across vast distances in extremely short periods.
What makes the FTL drives in the Hyperion Cantos unique and fascinating is the concept of "Hyperdrive," which allows spacecraft to achieve instantaneous travel between two points in space. This instantaneous nature of travel eliminates the concept of travel time, making it faster than traditional warp drives or wormhole-based systems found in other science fiction universes.
The reason why I appreciate the Hyperion Cantos' FTL drives is that they challenge the conventional limitations and constraints associated with faster-than-light travel in other sci-fi stories. The notion of achieving near-instantaneous travel adds a sense of awe and wonder to the universe, enabling the exploration of distant locations and enabling complex storylines to unfold.
Moreover, the Hyperion Cantos series is renowned for its deep world-building, intricate plotlines, and philosophical undertones. The FTL technology in this universe serves as a catalyst for the exploration of various themes, such as time dilation, the nature of consciousness, and the impact of advanced technology on society. It intertwines seamlessly with the overall narrative, enhancing the sense of adventure and discovery.
Overall, the combination of the unique and imaginative FTL drives in the Hyperion Cantos, along with the compelling storytelling and thought-provoking themes, makes it an engrossing and captivating science fiction universe.