>You confused UI with Usability.
I certainly don't confuse the two.
I couldn't care less what Craigslist LOOKS like, but its usability is profoundly broken in some areas (Denver Metro, for example).
The problem is that there's a Denver, Boulder, Colorado Springs, and Fort Collins Craigslist. For those of you in the Bay Area, that would be roughly like having a distinct San Francisco, San Rafael, San Jose, and Santa Cruz Craigslist. If you're in between those places, which one do you look at? You have to look at more than one. Even if you're IN one of those places, which one do you look at? Sometimes three or four, if it's something you're willing to drive an hour to buy.
And if you're POSTING, where do you post? If you post a popular item to Boulder (because, say, you live in Boulder), then people in the next town over who only know about Denver won't see it, so you also have to post to Denver if you want everyone in a reasonable radius to see your item. Which means you have to violate Craigslist policies AND mess with your listing enough to get past its spam filter.
The sad thing is they've fixed it to the 80% level in the Bay Area, where the whole (extended!) Bay Area (even Santa Cruz, which isn't really Bay Area) is on a single Craigslist site with sub-area filters, but they just leave it broken here.
THIS is a usability problem.
And honestly so is the lack of "map these results," for times when you want to see which ones are closest, or which ones you could stop by on your way to work, or whatever.
It's not because it's not shiny or doesn't have gradients or drop shadows. It's because key features that I want from a classified site are sorely lacking.