They claim that a poll said only 10 percent of people had a flawless install but the link actually shows 16 percent had a flawless install with another 12.5 percent having only minor problems. I don't know whether those numbers are good or bad. There's a selection bias in the poll (people with problems are far more likely to be cruising the site). I'd like to see a random sample. For myself, I installed Karmic on a quad core desktop and a netbook with no problems at all. The first time I've installed any Unix without any grief.