I do like the Solo II. It's very easy and quick to adjust. The cons i see in this product are that the scale is just in feet. I'm just to meters so it's kind of a mindswitch and a little bit harder to figure out the exact altitute if you jump with other guys. My bigger problem is that i think that the Solo is not loud enough. I often overhear the first alarm and only hear the second when my parachute just openend. This might be because my helmet isn't very isolated against the wind noise. But overall a very useful device i really recommend, especially if you just started skydiving.
Solo II
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in Altimeters
Blue Skies