Reykjavík - a bit on the short side. Astraeus nominated it as the
Captains Only 'crash' div, when I started there in 2004 but subsequently declared it 'too short'.
Akureyri requires special briefing,- it used to be Cat B by day and Cat C by night which can be limiting for crewing.
Egilsstađir fairly straightforward.
Both A LONG way from Reykjavik - many hours by road. Both generally will not have the same weather as KEF
Vagar - turbulence was, I recall, the major problem there is terms of 'reliability' of usage as a div. with Iceland and Scandinavia used as alternates.
When wx was 'bad' in KEF, generally UK north was used as an alternate with a PNR and decision normally being made at or shortly after ToD. Fuel for EGPF/EGPD from G/A was excessive.
Things only went adrift occasionally
