On my way to the Bubble from Jaques in an unmodded AspX (jump range 32 ly). I have lost count how many neutron star jumps I have made, but I have to say it is a lot more pleasant than the traditional method of star to star. It saves me 4 jumps each time I use it, and I do seem to be making much faster progress than with the regular method.
A lot of the extra speed comes from FOMO. This is the Fear of Missing Out. Each jump I do, I am tempted to scan the system I reach and examine it on the System Map .... and maybe go and look at something interesting ... in case I am missing something important. With four less scanning points each time I jump, I speed the whole process up without feeling guilty !
I lose about 1%, occasionally 2% on a bad jump, each time I jump. Once, I had the FSD Failure announcement. Though the FSD kicked back online, it was down to 75%, so I guess there is an occasional chance of needing serious repair. Good job I carry an Auto Repair Module. So far so good. I am repairing the FSD as soon as it goes below 94% as a precaution (I have no idea if this makes a difference, but I feel better that way).
So you do need to carry a repair module just in case, or rely on going station to station along the way.
Edit - add .... My Auto Repair Unit started with 4000 units, and I am now down to about 2500 after getting past the 5000 ly mark, including that unfortunate FSD failure that swallowed 1000. So I may need materials to charge it before I have finished the journey, maybe not. Touch and go.