Currently, I'm a huge jQuery fan and I've been using jQueryUI pretty heavily over the last 4 months or so on a particular project. The more I use jQueryUI the more I hate it. I still love jQuery but jQueryUI is clearly an afterthought, in my opinion.
I've been casually looking for something better and I've been running through the Dojo Dijit docs and examples a bit today. I'm curious what others currently think about Dojo and the Dijit libraries. I've heard that older versions of Dojo were horrible but their newer version is quite a bit better.
BTW, please don't recommend other toolkits / libraries. I want to keep this discussion really focused.
If it may be helpful for you, here is my experience.
Several times on different OS during the last year I tried to run the dijit samples with no luck. The best result was - it simply didn't work. In the worst case my IE failed and I had to reload the desktop. Think, I could find the reason and to run it finally. But for what ? If the site that is aimed to demostrate the abilities of the library (including browser independency by the way) fails from the very beginning, what the hell else I need ?