This is Dan Millican, host of the In The Hangar show we did the interview with Dan Bass. I'm glad someone did a review of the three CO detectors. I had the Tocsin and had to replace it after about 18 months when it stopped working. Then the second one stopped working. I decided since it was made for the "aviation" industry, there was higher mark up, so went with the Forensics and its been okay (drawback is the battery, which is also a pain with the Tocsin). After interviewing Dan for the show, I ordered a Sensorcon and have received it (but haven't gone flying yet). Looking forward to trying it out. And BTW-- Dan, thanks so much for sharing your story. The fact that your out there telling your story does save lives, even if you can't measure it. So thank you for that.