It has been treated as almost as bad as the Sun Crusher in some contexts.
It fires five shots then breaks apart, the power of a lightsaber, far greater than a disruptor with the requirement it needs a lightsaber hilt, crystal, battery supply and all...which is just stupid.
Then we get towards the fact that this ammunition is just heavy and blocking it just be a massive pain. How would anyone feel on the fact they got shot at "from a lightsaber" with no lightsaber on. That is almost as bad as the lightsaber pistol but no damn way to really block it.
Finally, there is one called
Farkiller which...has a range of 100 Kilometers. That is ten max length SSDs you are firing away from and it is accurate to the pinpoint.
Oh almost forgot, can blow up part of a building self destruct style with the power of several thermal detonators.
To put it bluntly....it is a very bad, very stupid design. One of Disneys "Canon" projects that while yes, be fun to own, is beyond bull honky broken. I honestly hate a good majority of Disney Canon during this period and a majority has no clue how it should work, nor do honestly want to mess with it. The comic run in question, Darth Vader, I actually read and is rather fun. Doctor Aphra is a sideshow of the Darth Vader comic and is rather good as well.
But remember this, while Darth Vader is somewhat a celebrated run, it is considered by far one of the most goofy and most ridiculous comic runs I ever read. I won't spoil it by any means, but it literally becomes a Comic Book in of itself, in parody multiple upon multiple times. There is even an EVIL duo of R2 and C3P0 (Sadly not the C3PX) that shows up in the comics.
Again, it becomes from something far dumber than most seen. Don't believe me? Get a trade paperback of the comic...you will see. Aside from the Droidika scene, badass!