I wasn't expecting it to do anything... I only found out about it yesterday.
This technology is effective, because in a fire fight you usually know where your friends are so when you get the info from this bullet radar, you can tell which are friendly and which are enemies. That is on top of being effective for locating snipers. I'm not hating on it at all. I'm just saying that it doesn't tell you where your enemy is, it tells you where a bullet has been fired from. Frodo's post left out that out, and I thought it should be mentioned.