Many things. The feel is different (typing is more pleasant - hard to describe but it's clear when you compare them next to each other's), it has one more keyboard row, and I also like the fact that there is a color scheme: some keys pop out visually so it's easier to differentiate the keys compared to most keyboards nowadays where everything is black and boring.
Curious, what's great about it?
Many things. The feel is different (typing is more pleasant - hard to describe but it's clear when you compare them next to each other's), it has one more keyboard row, and I also like the fact that there is a color scheme: some keys pop out visually so it's easier to differentiate the keys compared to most keyboards nowadays where everything is black and boring.