Yes, cheap and effective.

If you try it though, dont put more than you need around the cable, between the cable nub and the plastic guide that it passes thru, otherwise you find out that you never get back to just an idle.

I have had mine on for a couple of years, and only just recently cut the old ones off and re-tied it again to make sure its ok.

The first time I did it, I could not believe the big change on the responce, so much my mileage went down the tubes cause I was enjoying it soo much. ;)