My recent biggest issue with the zoom isn't the conservative side, but the safety stop timer. It does not count down the seconds and in the event you have swell, it will restart. This was frustrating to me with my cousins sons because they were taught to do 3 min (and you should) but those stinking computers reset more than once and our 3 minute safety stop was over 5 minutes. Needless to say, the 14 year old was worried about his air and they didn't understand. But they were not coming up. It is too sensitive to swells and I don't like that you can't change the safety stop depth. Other than that, they are great for novice and experienced. I don't like them myself as I like a little more options with my dives.