Flyaway,
Yes, BHD is usually considered as 'tricky' as it is unusual to have an excess of local f/d crew, so crews are sent in from elsewhere, and despite it being a great place they are keen to return closer to home. This means a fairly healthy turnover. I understand that at the moment, for FOs at least, there is a waiting list to get in. The other tricky bases are EDI and GLA, but it appears that ops at GLA are being scaled back quite significantly, so who knows.
As regards sim slots, be prepared for all the unsocial hours, particularly in Toronto and Seattle. The Japanese pay big money for their sim sessions and so get to cherry pick the socially acceptable sim times. Everybody else makes do with the middle of the night.
