This is still my personal GOTY.
My biggest complaint was that by the time I got to Poseidon (the area that I did last), I felt like I should've been heading on up towards Olympus already...and Olympus (e: Poseidon, not Olympus) was a fairly big area, so I had to take a few days break to get motivated into finishing it.
My complaint would be crashes. I think I had 10 crashes in 16 hours