The final volume of Green Arrow feels like a long time coming. It collects some random as-of-yet uncollected issues, which makes it a bit of a hodgepodge of quality.
Issues #39-40 are an arc set in another country that tries to get back to Ollie's interfering-adventurer roots with varying success. It's fine, but the supporting characters and conflict aren't the most compelling. #41-42 are far more successful, as Ollie tracks the Parasite through the sewers of Metropolis. It's a classic underdog story, and the claustrophobic nature of the story works really well.
And then there's issues #48-50, which I've already reviewed over in the Heroes In Crisis companion trade. Suffice to say it's a decent end to the series and ties off the remaining plot threads, but it feels a little unsatisfying as the book was kind of cut short.
The art's also a mix, with Matthew Clark on the Parasite story, Javi Fernandez on #48-50, and Marcio Takara for the opener. If those are in an odd order, it's probably because that's the ranking I'd put them in overall too.
For closure's sake, this is worth reading. It's all over the shop, but considering we don't have a Green Arrow series right now and haven't for a while, we should take what we can get.