I have used Dive Log for the last 3 years and would highly recommend it. If you get an Oceanic computer you can import the data in to the program. It will graph your dives, track SAC rate, etc. The guy who developed it is in Germany, but I have over the years emailed questions and he always responds immediately. He also provides
free updates to the program at least once a year. Two thumbs up for Dive Log!

I have the Aeris Wireless transmitter....have used it for three years and NEVER had a sync problem. If the transmitter goes out, the only data not available on your computer is tank pressure. I have a small SPG so that IF this ever happens, I have redundancy. I also use the SPG to make sure my pressures agree before each dive, and usually do another check after I am at depth. It is okay not to "trust" them...I don't trust most of my dive gear...that is why I have redundancy....but I still use it.