It's comfortable in the sense that it's not in the way. By the time you hit the lower bout, my hand has shifted to this position:
View attachment 4892595
And the edge conforms to my meat pillows with sausages for hands. The edges are rounded over just a bit (and when I do my finish sanding I will probably do some more...)
One note, while this is a 24 fret instrument, you really can't play much above the 22nd fret without reaching over the top. I could do some scallops on the top to facilitate reaching the upper frets.... I'll have to think about that.
Not an issue for me, because I usually am a "stay at home" bass player and most (99%) of what I play is below the 12th fret.