From a point of view as an outsider who deals with the easy crews at NCL on a daily basis, they are a great bunch - both flight deck and cabin crew. Noticeably more approachable than any of our other crews here and I would work for them any day. Currently 6 x 700s and approx 15 different routes, mostly daily.
Easily commutable to EDI, either A1 or A68 and about 1h40. GLA not so easy, and around 2h30m by road (A69, M74), but far quicker by train. Absolutely shed loads of reasonably priced housing in the area too, especially new apartments, and airport easy to commute to from almost anywhere locally. As a base, I'm biased and reckon its a little known gem.