I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
These are four separate stories, one of which was two issues long. I've seen another review saying this works best if you've read some of the expanded universe - EU - comics before this, so maybe this was why it didn't work for me. I stumbled upon these on Marvel Unlimited - MU - though, and wanted to read it.
It's an interesting look at Vader, and his relationship with Palpatine is particularly of interest. Vader disobeys orders, fails, and is far too obsessed with Obi-Wan Kenobi. Yet another review questioned why the Emperor kept him on. These four stories are all set within a specific era, after order 66 is given, and all focus on Vader's missions against various Jedi.
I suspect, after reading this, that it's because if his second gets too powerful, too clear-headed, and too competent, he may try to overtake him. Vader is powerful enough to create fear in others, and work as a very competent enforcer - but for his own reasons, he won't try to betray his Master. It's kinda the perfect system, even with his more than occasional missteps. (Which are something that Palpatine can hold over his apprentice's head, as well.)
The second story, one of a Jedi who comes to want to take Vader's place, in particular didn't work for me. It was too disjointed, to be frank. Fun enough for me to want to continue with the Star Wars comics available, but nothing that I would reread.