I have been using GPS units for a long time and never had one take 20 minutes to aquire a fix. My take would be it's either a bug in the unit if it takes that long or your not in an open enough area (read around tall buildings, trees, etc). 20 minutes to me = send it back and get it replaced.
If you turn the unit off and go to a new location distant from where you were when you turned it off, I can see it taking a little longer to find the sats but not 20 minutes. Maybe an extra minute or so... It would be a useless device if you had to wait 20 minutes to drive your car...
Originally Posted by gpend
First; excellent review, just what I was looking for
Next; several sites list a feature of mmxc external antenna connection, have you found this, if so, can you post a picture
Finally; to answer a previous user's question: The reason a GPS can take a long time to aquire is that it stores a large amount of information about where the satellites should be. If this information is wrong for the area you are in or is out of date the GPS will download this before aquiring a location sometimes taking up to 20 minutes. Short answer: Be patient.