Even after switching browser mode to "Desktop", the majority of websites still come up as mobile. Gizmodo.com is the worse culprit. Digg.com sometimes works, but clicking on "Next" for the next page of news fails most of the time. Considering tablets are mostly used for web browsing, I've been really disappointed with its buginess.
As for the rest of the experience, more and more apps are being released which is nice. The bezel is a little thin which causes me to accidentally hit things at times. This also makes it a little awkward to hold. I already know I'll be returning it for a Galaxy Tab 8.9 when they're released, but if Costco gets the Acer Iconia A500 in the interim, I might return the Xoom early to give the Iconia a try.