It's a good airline for your first job, but that's about it. The recruitment was a bit of a mess. We all received the "Dear xxx, There are no jobs at present", 2 days before being called for interview!
The rosters are very tiring but I was always impressed with the safety culture. As for base moves, promotion etc.... This was controlled way too tightly by HR with little policing and consequently people moved out of seniority. If you complained, you were told to wind your neck in. Be careful of getting stuck on the Dash as you enter your 30's. Flybe are aware that the prospect of a Jet job diminishes from this point onward and you suddenly feel you are being left out to pasture, as those around you move onto Jets. A friend of mine was told his D8 command would have to be back at the base he spent 18 months getting away from, despite vacancies existing in his current base. When he complained and threatened to leave, the response from HR was "and where do you think you will go??".
Needless to say there was a mass exodus in the early 2000's and we all moved to Jet operators. If they offered a more stable lifestyle and better roster stability but kept the same salaries, then for some it would become a career airline. Alas, they were never that sharp, so a constant revolving door of pilots adds to training and recruitment costs, which eats away at the bottom line. Cest la vie.