Anybody out there have a set they bought and installed themselves? Want to get my wife's LGVX4400B set up but have seen everyhng from LG's professional install kit at $170 to "universal" kits at $24. All seem to be same configuration: a swivel mic pickup attached to cigarette lighter socket with a connecter to phones mic jack and earpiece from phone. Need some advice, the typical pros, cons, and horror stories.