Hastings is still an idiot.
Poirot is still arrogant and annoying.
And this one drove me NUTS for quite a while.
In the end, though, I ended up enjoying the mystery far more than I expected to.
Which is more than I can say for any of the other Poirots I've read so far. Granted, I've only read a few of them, but oh my gosh.
I think I need to give up on reading them in order.