An interesting device if you are already carrying around a laptop or already have a PDA. If you had to buy the software and a PDA it wouldn't really be cheaper than the Argo Navis - would it?
Also, it wouldn't interface with a GOTO unit like Servocat if you wanted to motorise. Reason why I chose Argo Navis for the 16" Tridob was to have a unit that was standalone, had lots of features and could connect to a drive system.
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