We have been having trouble with our GPSr lately (we might have overloaded it with too many PQs, oops!) and have found C:geo to be invaluable. We have probably found as many caches in the last month with C:geo as we have without it. (We have Android phones.)
The groundspeak app works fine, but we really like the live map function on c:geo--and it tends to be more accurate, and it loads faster.
We also have had ZERO issues logging from C:Geo. Also, full cache info is easier to access.
_________________________

Really into that "weird treasure hunting thing!"