I was initially very excited about this product: the information it stores, interfacing with a software... I was just post AFF when I bought it. Today, my story is rather different. The unit does not always log a jump the way it should: at altitude, the unit shows 13200ft, after the jump, the exit altitude was 3000ft! There is an issue with the date, but trying to update the firmware (which is supposed to fix this) does not work on a Mac; when trying on a Windows machine, I get a virus warning (Trojan:Win32/Zpevdo.A)!! What if this unit starts showing the wrong altitude? Bottom line: I've lost my confidence and and support is really really bad.