Very easy hat, very cute (well, maybe not on me, but in general it's very cute). It took me awhile to knit but I'm really slow. I made the ribbing too wide--it grew to three inches when I wasn't looking when it should have been two, or possibly four so I could fold it over properly. Three is just awkward, though:
I am so not a hat person.
The pattern goes to plain knitting once the decrease rows start. I kept up the yarn-overs until I had to change to double-pointed needles and the yarn-overs got to be a pain. This gave it a bubbled top; not cuter nor less cute than the original, I think, just different.
And, yes, there are some mistakes. Whatever.