Power Plug For Sega Genesis Controller

Do you guys think that ill get some fun out of this? i never had one before or used it before. I see it online for $4.99 new so its pretty good price. But i want to see who has one.

its found here
http://bestsku.com/productsDetail.asp?PID=2725

yea your right. I do see that i can get a new genesis controller with a turbo button for 4.99 on the bestsku site

but im really curious to use that powerplug thing. I might get it to see first hand what it does.