If you're skeptical, try an inexpensive one first. The Absolute Power Cord is a good for that won't cost an arm & leg. If you don't like it, you can sell it here, and get most of your cost back...here's the link to them.
http://gttgroup.com/avframe.htm
Cheers, Spencer
http://gttgroup.com/avframe.htm
Cheers, Spencer