From Evernote:

Arrow #5 Review

3 / 5

This has been a series I've really enjoyed, though this issue isn't its strongest moment. As is the case with every issue, this is a 3 story book. The first chapter is simply a 'Hood' in Shanghai story. Nothing bad here. Nothing special. The next chapter revolves around Laurel and her sister, Sara, as kids in school. It's a good story to have in that Sara plays such an important role in the show without having ever made an appearance (well, except the one where she dies). We get some snapshots of family life before Sara's death and how Laurel ultimately finds her calling in law. It's probably the strongest one of the three chapters, but nothing remarkable. Finally we get a story about Hood attacking a hijacked train. It's a fun hero kind of story, but nothing remarkable. 

Like I said, great series, average kind of issue. I certainly wouldn't skip this if you're already invested in Arrow, but there's no reason to jump in here.