||It's design is simple and effective. Since you most likely already know what it is, let's move onto the pros and cons.
-Does what it was intended to do.
-Somewhat universal, as long as your sight/scope doesn't extend past the rails, you can attach this to protect just about anything.
-2 different shields (clear and amber)
-Thick and sturdy
-Price, $16 for two pieces of "plastic" and a rail mount. You don't feel like you get what you paid for. I must admit, it is better than sending your broken sight in for warranty or buying a new one altogether.
-Thin plastic that is slightly difficult to get off placed on both sides of the shield (can be a pro as it protects from scratches before use). I would have preferred the plastic had been easier to get off.
-Not perfect protection. BB's can still by the areas it doesn't protect, although the angle of the shot needs to be around 85 degrees. Similar to how most airsoft field require full seal goggles. These are like wearing shooting glasses, safe, but at the same time slightly risky.
Conclusion: Worth the money if you have even a decent reflex sight like I have. Mine has already been hit near dead center at the last airsoft scenario I went to (160 vs 160). The shot would have hit my sight for sure.
Rating: [4 of 5 Stars!]