Yeah it appears that the only benefit is the wireless connection
I suppose it depends how much you want to muck around with it?
Logging could be another benefit - I'm assuming that to get any sort of logs you would need to drive with the laptop connected?
My laptop rarely ever leaves the house so having an easy to use device at anytime could be a bonus
I think you need to pay for the app as well - not sure what costs are associated with that
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