Oh, I *love* and *adore* my artist bench. Practically speaking, one of the main attributes of the bench is that the height can be easily adjusted. This means that I can adjust it where I need it for different things, but also each of my students can adjust it to where they need. This means I can ensure an appropriate approach to the instrument.
Also, the kind I got is extremely well-built and stable. So, I feel like I am sitting on some sort of rock (with leather trim and lovely cushions underneath). It is extremely sturdy, but it's also ridiculously comfortable, too ! It *makes* me want to sit there and is one of the most comfortable seats in the entire house.
Psychologically speaking, having a special bench for when I sit at the piano, I just feel like there is somewhere very specific for me to be as a piano artist. That may sound a bit silly, but it's really true. The fact that all of the above is also true really aids in the psychological aspects though.
Sure, I could make just about any bench work if I *had* to, but having something that I feel is just right is a real luxury to me. I am not distracted by the bench at all when I play, either, which is not always the case with other benches.
I love my benchy bench

.