I had looked at a lot of chairs and I was leery about purchasing an office desk chair without trying it out first but OMG… love this chair!!! I am 5’11, average build and I, like many (after ready reviews) cross my legs when I sit at my desk (sit Indian style and cross one leg over the other). I always have had issues with not enough space between the top of my leg and the desk…. However, there is plenty of space. It is very comfortable, I don’t feel like I’m falling off the chair when sitting Indian style. 
I highly recommend this chair, the seat base is very wide, yes the seat back is low but that’s ok!!