Sorry for the late update!
I obtained my V2 Cardboard last week. Since then, I been having fun trying it out. It being made almost entirely out of cardboard, I like the way it is presented in a cardboard box sleeve case when not using it. Removing the V2 from its casing, instructions are clear on how to unfold it and paring is simple via the QR cord when using the Google Cardboard app.
Pro tip - Go through the tutorial app to know how to "exit" an app when playing around with the app
As I saw among other posts/articles, the experience is better with headphones. I been using the V2 with a OnePlus 3. So far so good! Glad I got Cardboard as an "intro to VR".