GG Optic Covers?

[HMP]

Any of you use/own one of the GG EOTech optic covers?
Picked up a EXPS the other day in GSO and saw one of these on instagram (a gun and parts swap page) for 30 bucks

Wanted to get some feedback from local fellows

 

[Short Fuse]

I have a set on a 512 and they work as designed. They are ok , I am not in love with them but it is nice not having to keep up with covers.