They are very slow and they miss a lot of the land that was designated to be decomposed making you press the decomposer sign multiple times. This needs to be fixed its been an on going issue and is really anoying.
Some things that would vastly improve hyperdrive function. -Make it so the time it takes for the hyperdrive to charge up correlates to the distance you are traveling. -Make it get you to the exact coords, it is off almost every time by 500-1000 blocks.