I've actually no idea how good Windows 8 is, since the tile system is so unpopular no one even gets as far as talking about anything else. That's a pretty big fail right there.
Or people are too busy using it to comment but I'll take a moment. The new tile system is far faster to find, launch and organize applications than the old Start Menu.
I played with the RC for a while and must say the article is absolutely right. Navigation wise it's a complete nightmare, totally un-intuitive and illogical. Went back to Win7 after a month or so with no regrets.