I'd recommend it... 3 to 4 wire installation depending on your setup. Also had instructions for wiring a relay for stereos without a mute line (4th wire). I put it in this way and it works great, turns off my stereo with every call/voice dial etc. The speaker is plenty loud under my passenger compartment. Only two minor complaints: it tells you every time it turns on an connects to the phone (mildly annoying) unless you turn off voice mode, then it doesn't announce callers however. Also the sound quality is good and clear, but not as deep a sound as I had hoped (not unexpected). I can live with both of these however.. especially for the price (compared to parrot etc) and ease of installation.