You know what...Ive seen them in the trade mags and at the hydro shops. Never owned one but they seem like a damn good idea. I might have to pick one or 2 up. Just for peace of mind and you never know. Smart idea really. I do have a smoke detector in my basement grow room as well as a wall mounted extiguisher. The small spray hand held ones. But these auto dealys for growrooms seem like a smart way to go. A fire would devastate me as well. Not legal wise as Iam in a medical caregiver/patient state but all them thousands of dollars in equipment and potentially losing my house. No thanks. Iam gonna grab one myself. Should of a long time ago. They been out for awhile now.