Does anyone have experience with this device.

http://www.autopartswarehouse.com/sk...gs+Best+Seller

Not me but it looks to have potential. Maybe try a generic search to get some reviews?

I have installed a few them in the past. They are not bed pieces, but I never did one on a maxima before. I used to put them in altimas, sentras and cubes. I believe they only work with the base radios. If you have the Bose system I don't think they will work on your car.