Sounds like it's the first time you know AAPL. You won't get disappointed if lower your expectations of products from such a company. I am using iPhone SE as a digital wallet / dumb phone, the new UI doesn't make it worse because it's already buggy and nonresponsive. Newer devices on your hands will perform as bad after three years.
Its dimensions are 312mm × 123.06mm × 35.76mm, so volumetrically it's 107.8% of a generic 14 inch laptop I'm currently typing on.
The power button is the top right key on the keyboard, right next to the F12 / Delete key.
It is wedge-shaped, not a box. And a lot of the thickness is because it has a mechanical keyboard. You should really compare it to a "gaming laptop" that also has a mechanical keyboard — and those tend to be quite thick as well.
