Agree that the specs are decent. To me, the biggest weaknesses are the slow production lines (7 per month i think) and the lack of a used market. If you lease the new planes, then that's ok, but definitely don't buy them unless you are prepared to keep them the rest of the game.
Also, the operating costs (4 pilots is a lot for a small plane) and high maintenance costs (3400 vs 2000 (electra) for A checks) offset the cheaper up front cost.
I do like the high speed though.