LiveTrack24 seems to be very popular with many soaring countries. These are the units (70) which were purchased by the Gliding Federation of Australia (GFA) (aka Australia's "SSA") for their membership to be used at Australian contests and other soaring events.
These were used at the Benalla WGC in January and worked EXTREMELY well.
Here is a LIVE example (HAPPENING NOW) of LibeTrack24 tracking in South Africa of LiveTrack24 for their ongoing FAI SGP.
It is clear to me that most pilots are FAR TO LAZY to use mobile tracker apps (which require a bit of finesse). These units are simple. Turn them on by pressing a button. Charge them at night.
http://www.livetrack24.com/tasks/3592
Sean