Anyone using the Panasonic 20mm f/1.7 with lens hood?

It's a shame that Panasonic didn't create a lens hood for this lens. Someone posted a link to B&H for this lens hood.

http://www.bhphotovideo.com/c/product/116976-REG/General_Brand_46mm_Screw_In_Rubber_Lens.html

Does anyone here know if this causes any vignetting? Is there a better alternative to this lens hood? Will a lens hood even make a difference for this lens?