I bought a galileo sol from beaverdiver and all I can say is that it works wonders, I got
It with air integration and heart rate transmitter! I haven't had any problem with it at all. And the compass on them is really good, unlike others you are able to adjust how long the compass stays on the screen so if your mapping you can make it stay there the whole time and till you change it back to dive mode. I bought a $6 IR transmitter from eBay and just updated my computer so it is ready for trimix and the new apnea function for free diving. About the air integration, Im thinking of getting a Spg for it but with air integration it calculate the remaining bottom based on how much air you have left, breathing rate, safety stops as well as deco. But I wouldn't have a spare compass with me, if in the event it did crash, I would just follow my buddy,