I wager that maybe, probably, possibly, perhaps the GUI of this thing looks like ass and feels even worse. There used to be screenshots, you can google them. But maybe don’t.
Looks great, so sad that it's yet another web framework. Kinda smacks of GNOME, though.
Cappuccino improved upon javascript by using a different language (objective-j) that added many features js didn't have, and it used the same (mostly) well-honed api as AppKit. In comparison to other js UI frameworks of its time, it was lightyears ahead.
PS: Compare to today, with code slop (and good agent-mediated code: It also increases overall speed).-