I wrote this as one giant review for War Of The Bounty Hunters as a whole, so feel free to jump to the relevant section(s).
Han Solo, trapped in carbonite, is still somehow the most wanted man in the galaxy. Boba Fett has a mission - to transfer the captive Han to Jabba's palace. But the mysterious Crimson Dawn has other plans, and a shady figure from Solo's past is out to make her mark on the galaxy once again, even if she has to involve literally everyone in Star Wars comic-dom to do it.
War Of The Bounty Hunters - 3 stars
First off, War Of The Bounty Hunters is a bit of a misnomer. Aside from maybe one or two fights, this is less of a War Of The Bounty Hunters and more of a fight for Han Solo, and even that's not really a fight. But I digress.
The problem with stories like this is that we know how they're going to end. I've said it before, but telling stories in this era of Star Wars is so difficult, because we already know where all of the characters are going to end up. So when Boba Fett loses Han Solo's body at the beginning of the series, we know for a fact that he's going to get it back again, because otherwise Han won't be at Jabba's palace for Return Of The Jedi. And sure enough, that's how it all goes.
The stuff in the middle is interesting, I'll give it that. The return of Crimson Dawn is well executed, and a good way to salvage some usable story material from Star Wars' only box office flop (Wikipedia's words, not mine), but I don't think we really needed a massive vehicle like a 34 part crossover to facilitate said return.
War Of The Bounty Hunters Companion - 2 stars
This collection of four one-shots is almost entirely unnecessary. The Jabba The Hutt one-shot actually features Boba Fett, but it's all flashback stuff that has no bearing on WotBH at all. The 4-LOM & Zuckuss one-shot is nice, but hardly essential, while the Boussh one-shot is more of a set-up for Doctor Aphra's next adventure and has literally nothing to do with the rest of WotBH since Boussh doesn't even appear in that story. IG-88 fits in neatly at the end and was the one I wanted to see more of, but I guess he's being mothballed again for later.
Despite being a 'companion', you'll be fine not reading this at all, to be honest.
Star Wars - 4 stars
In terms of tie-ins, there's always one book that's more necessary than the others, and it's no surprise that it's the one also written by Charles Soule. Star Wars' WotBH arc fills in some gaps, gives us some more motivations for the mysterious Crimson Dawn leader, and has an epilogue issue that looks like it's setting up the next big crossover right away.
There's definitely an echo of 'we've done this before', with a lot of scenes replicated almost word-for-word with the main WotBH book, but it's not too distracting. They're there for context, but I feel like if you're reading any Star Wars book alongside WotBH, it's the main one.
Doctor Aphra & Bounty Hunters - 4 stars
These two books probably do the best of running with WotBH without derailing their own stories. Whether WotBH was planned earlier or not I'm not sure, but both Aphra and Valance's adventures dovetail nicely into the main story without losing any of the momentum that their own books have been building. Even the side stuff (Lucky & Ariole's story in Doctor Aphra, and T'Onga's story in Bounty Hunters) come into their own here, despite feeling a bit separate early on in the tie-ins.
Bounty Hunters especially has a really good final page hook that has me really excited to see where we're going, and I enjoyed Doctor Aphra's use of continuity by throwing her up against Darth Vader midway through and having to cope with some PTSD from their last meeting.
Darth Vader - 3 stars
Vader's story is hamstrung by the fact that all of his important plot points are covered in the main WotBH book, so the tie-ins are left to flit around the outside. We get some additional insight into Vader's thought processes, but the interesting stuff is over in Ochi Of Bestoon and Administrator Moore's court. It must be hard when your main character is essentially unable to do anything he hasn't already done, but the strength of these supporting characters makes up for it.
Like Bounty Hunters, there's a good final page hook here as well that has me intrigued about what Vader's going to be facing next.
Artwork
Almost every issue here is pencilled by the usual suspects from each series, which is nice - too often during crossovers do regular artists dip out in favour of fill-ins, but that's not the case here. Ramon Rosanas on Star Wars, Minkyu Jung on Doctor Aphra, Rafaelle Ienco on Darth Vader, and Paolo Villanelli on Bounty Hunters are all present and correct, while Luke Ross handles the main War Of The Bounty Hunters book (and the legendary Steve McNiven pencils the Alpha).
The one-shots are a bit more of a mess, though none of them are particularly bad. David Baldeon's Boussh one-shot lines him up as a good successor on Doctor Aphra if he wants, but the others are all kind of forgettable.
Overall
War Of The Bounty Hunters didn't need to be this big. It manages to maintain itself across the six trades without falling over under its own weight, but it's telling that I'm more intrigued by what's coming next than what's already gone. Each of the individual Star Wars ongoings manage to keep their own stories flowing with various degrees of success, but when the main event book is kind of the weakest of the bunch, I'd say something went a little wrong.