I absolutely love the hyperoptiks, and I use it all the time. I just buy a clear screen for my Tk8 and mount her up.
It works in the daytime, and it works at night, - no more worrying about day turning night and what shield I have. Its perfect.
Also, it NEVER, EVER EVER fogs. I rode with it all winter. Love it.
You just have to be careful when installing, - you cant lift it back off once its on. So buy a clear shield for your lid, and be prepared to commit this to it.
If you are careful, you will make sure that it is lined up before applying it to the shield.
I swear by em.