I've never used one either.. but the propaganda says it saves wear on cabinet edges because you aren't leaning against wood. They are handsome and I suspect that's the appeal here but another advantage might be that they sit forward of the back splash more and so you can reclaim some of that space behind the sink. But this is just supposition.
ooh ooh! Pictures when it's finished! I told my DH that the next house we get is going to be built around the kitchen no matter what!!
I've not used those sinks either but seen them in Lowe's and Home Depot.
I like a deeper sink for my bigger pots though.