I"m pretty familiar with the Dainese systems. The street jacket is heavier than most jackets with all of the electronics and the air bag. Each system has a GPS, 3 accelerometers, and 3 gyroscopes. It uses this data to create the algorithm's that are used to tell the system when to activate (and also when not to). It's a pretty impressive piece of technology. In the next few years I'm sure you'll see many changes to the systems from both companies but even now it's a pretty proven technology. I have one friend that has the street jacket and a few that have the track suits and have used them for quite a few years now. Don't know anyone with the apinestars system yet it's still pretty new in the US and not many out there. dainese has been selling them in the US for about 5 years now, A* just came out a few months ago?
with Dainese I know they recommend sending it back in every 5 years to check on the software, the integrity of the bag, etc. With the track suits, I know it'll last a weekend without any issue, they recommend plugging it in every month to keep the charge up if it's being stored. I assume the street stuff is similar.
the track suits you can plug it into your computer and download your track data, it's a custom version of the 2D Telemetry that is used in Moto2 racing and is included with the suit. lap times, G-forces, etc. Not 100% sure this is included with the street jackets, but I think it is.
http://2d-datarecording.com/en/produkte ... ese-d-air/