We went on a snorkel tour with Finni, after Gisli organized/coordinated the trip with us from 3 months out. Everything went smoothly and the snorkel was well worth it. We weren't able to dive because I am not PADI certified, but the snorkel was just as amazing!
Would highly recommend. Dive.is/divethenorth.is also limit all groups to 4 people, which keeps it nice and small and you don't get lost in too large a group.
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