Only for people who haven't developed for any other OS :P

There are some APIs that are real stinkers (and quite a few of them obviously targeted at use of a single Google app and noone cared to actually make them good APIs).

Several of them are really well thought out and designed to the point that iOS devs were envious for years.

Gain some, lose some. It's not the best API surface, but it aint GTK or Win32 either.