Good video. I agree, I've used this Carson lens in my Headplay goggles for over six months, Carson works great. These inexpensive fishing lens are way better than the $45 RHO lenses from Germany, which were apparently made specifically for Headplay goggles. Although the RHO is a quality lens they only come in one power, and for me it's not enough. Maybe someday RHO will have other power lenses available.
With the stock Fresnel lens removed from the Headplay Google, the +4 power Carson lens works great for me. Even though they are a cheap lens, they actually work very good.