Sorry lpgm, never had a chance to use their service so can't really advise but I can imagine they wouldn't recommend anyone dodgy on their website.
It's a small airport and rather friendly staff, so even if there is any issues I'm sure they'll be able to sort you out.
Would definitely give them a call and check their departure times and how many people can be packed into one taxi. Ask them also where is their drop off point as they usually just drop passengers in the city center.
Let me know if you need anything, I'm sort of a local:)
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