Careful, careful, careful!!
I can’t find any rating on the above goggles (OD, optical density), and even if one were listed, I wouldn’t trust my eyeballs to a pair of <10bux goggles.
Take the laser, shine it on the wall from a few feet away. Now put the goggles in front of the laser. If you see, well, anything, on the wall, they’re not good. At best they’d slightly limit damage to your eyeballs, but at worse, they’re a false sense of security and you can do some serious damage before you even know it.
Even a paltry OD3 (meh) would reduce the laser’s intensity by 1000, and an OD5 (decent) would reduce it to 1/100,000th its intensity. So if you can still see the laser shining on the wall, like, at all, they’re just tinted plastic.
I play around with 1W violet lasers and occasionally some more powerful ones. Even a glancing reflection from a screw-head across the room for the smallest fraction of a second could burn your retina and leave you with a permanent blind-spot (or -streak) for the rest of your life.
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That said, tres kewl! 
I know alllllll about alignment issues. I wanted to make a Predator-style parrot-gun from 3 red lasers, and nah, you’d need to really tweak the lasers’ aim and then pot them in epoxy to keep any jostling from throwing them out of alignment.