I agree, I did my initial licence at a different office to my
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year extension and the process was much the same and very easy.
It took about 30 minutes for the first one and an hour for the extension after 2 years.
I didn't go to check my paperwork was in order, so it was one visit each time (I just keep a file with everything they could possibly ask for, just in case).
Very simple, no need for agents and no need to risk not being insured by avoiding it, and using the IDP for more than 90 days.