It is an interesting device but I feel that the biggest problem with this sort of technology is that it may make fish keepers apathetic to monitoring their tank using their own eyes and common sense because they have put too much trust in the device. So if the device were malfunctioning and the person was unaware of it, it could be very catastrophic indeed. I like the part where you can access your results from a remote area. Just what you need, to realize you have an ammonia spike whilst sitting on a beach in Hawaii, lol....