Whats the best "FREE" soaring program for the PocketPC

Hi,
before I put my hand in my pocket and pay for a soaring program which
I can use on my iPAQ, I'm interested in hearing what people think of free
programs like XCSoar and GPS_Log or any other soaring programs which run on
the iPAQ.

I must confess that I also have a Palm pilot Vx and think that SOARING pilot
(http://www.soaringpilot.com/) is an outstanding piece of software of the
Palm OS. The only reason I'm looking at the iPAQ is because my company has
just bought me a nice shiny new 5550.

Any feedback on iPAQ gliding software would be appreciated..

Thanks in advance
Siggi