Pretty much everything
The cost. Apps that aren't updated yet.
OK, I'm an Apple ubergeek, and therefore already predisposed to love this phone before I got it. But then I got it, and I was blown away. Long story short, if you love Apple products, you'll love this. If you prefer Android, then you probably feel the same way about the Pixel 2 as I do about this phone, and that's great. Different strokes and all that 😊