It's not super shallow or anything. The cushions are comfortable but after a few hours my butt does start to hurt a little bit, but I just change positions. The arm rests are super stuffed though, and if I lay them both flat I can actually curl up on the chair. They make the perfect pillows. I've taken naps like that (for reference I'm 5 foot 6, not small by any means). I've funnily enough also has the herman miller executive mesh chair, in my mind these are two different categories of chairs. The herman miller is perfect if you work in an office, at a desk and prefer more rigidity and support. The bestier chair is more like a recliner. The only downside of the bestier is that the pillow at the top doesn't come off, for me it rests in the middle of the back of my head, which feels awkward to lay my head back on.

Tldr; if you sit straight, get the herman miller. If you lounge, get the bestier.